documentclass[11pt,a4paper]{article}
usepackage{bbm}
usepackage{times}
usepackage{latexsym}
usepackage{graphicx}
usepackage{amsmath}
usepackage{amsfonts}
usepackage{url}
usepackage{mathtools}
usepackage{verbatim}
usepackage[utf8]{inputenc}
usepackage[shellescape]{gmp}
usepackage{dot2texi}
usepackage{tikz}
usetikzlibrary{shapes,arrows}
usepackage{natbib}
usepackage{caption}
usepackage{subcaption}
usepackage{tikz-dependency}
usepackage{wrapfig}
usepackage{multirow}
usepackage{pgfplots}
usepackage{filecontents}
usepackage[T1]{fontenc}
usepackage{subfiles}
usepackage{readarray}
usepackage{xcolor}
usepackage{import}
usepackage{tikz}
usepackage{tikz-dependency}
usetikzlibrary{matrix,positioning}
usetikzlibrary{automata,arrows}
%usepackage{ifthen}
%usepackage{subfiles}
%subfile{graphs/q_value.tex}
usetikzlibrary{calc}
begin{document}
tikzstyle{line}=[bend right=30,thin]
pgfmathsetmacromyscale{0.95}
begin{figure*}
centering
%begin{minipage}{0.48linewidth}
%The first part of subfigure
begin{minipage}[h]{.60textwidth}
begin{subfigure}[t]{0.475textwidth}
centering
includegraphics[scale=.45]{example-image-a}

caption*{(1) 1st iteration}
end{subfigure}
hfill
begin{subfigure}[t]{0.475textwidth}
centering
includegraphics[scale=.45]{example-image-a}
caption*{(2) 2nd iteration}
end{subfigure}
begin{subfigure}[t]{0.475textwidth}
centering
includegraphics[scale=.45]{example-image-a}
caption*{(3) 3rd iteration}
end{subfigure}
hfill
begin{subfigure}[t]{0.475textwidth}
centering
includegraphics[scale=.45]{example-image-a}
caption*{(4) Final prediction}
end{subfigure}
end{minipage}
hfill
begin{minipage}[h]{.30textwidth}
begin{subfigure}[t]{0.475textwidth}
centering
begin{dependency}[theme = simple]
begin{deptext}[column sep=0.3cm, font=normalsize]
They & were & not & Poles \
end{deptext}
%add----
deproot[thick,dotted,edge height=30pt]{2}{normalsize <ROOT>}
deproot[red, edge height=30pt]{4}{normalsize <ROOT>}
%depedge[]{1}{2}{}
depedge[thick,dotted]{2}{1}{}
depedge[thick,dotted]{2}{3}{}
depedge[]{2}{4}{}
end{dependency}
caption*{(1) 1st iteration}
end{subfigure}

begin{subfigure}[t]{0.475textwidth}
centering
begin{dependency}[theme = simple]
begin{deptext}[column sep=0.3cm, font=normalsize]
They & were & not & Poles \
end{deptext}
%add----
deproot[thick,dotted,edge height=30pt]{2}{normalsize <ROOT>}
%deproot[edge height=30pt]{3}{normalsize ROOT}
%depedge[]{1}{2}{}
depedge[thick,dotted]{2}{1}{}
depedge[thick,dotted]{2}{3}{}
depedge[thick,dotted]{2}{4}{}
end{dependency}
caption*{(2) 2nd iteration}
end{subfigure}

begin{subfigure}[t]{0.475textwidth}
centering
begin{dependency}[theme = simple]
begin{deptext}[column sep=0.3cm, font=normalsize]
They & were & not & Poles \
end{deptext}
%add----
deproot[edge height=30pt]{2}{normalsize <ROOT>}
%deproot[edge height=30pt]{3}{normalsize ROOT}
%depedge[]{1}{2}{}
depedge[thick,dotted]{2}{1}{}
depedge[thick,dotted]{2}{3}{}
depedge[]{2}{4}{}
end{dependency}
caption*{(3) 3rd iteration}
end{subfigure}


begin{subfigure}[t]{0.475textwidth}
centering
begin{dependency}[theme = simple]
begin{deptext}[column sep=0.3cm, font=normalsize]
They & were & not & Poles \
end{deptext}
%add----
deproot[edge height=30pt]{2}{normalsize <ROOT>}
%deproot[edge height=30pt]{3}{normalsize ROOT}
%depedge[]{1}{2}{}
depedge[]{2}{1}{}
depedge[]{2}{3}{}
depedge[]{2}{4}{}
end{dependency}
caption*{(4) Final prediction}
end{subfigure}

end{minipage}

%end{minipage}
%End of The first part of subfigure
%The second part of subfigure
%PSD ood test set
caption{}
    label{fig:example}
end{figure*}

end{document}

documentclass[11pt,a4paper]{article}
usepackage{bbm}
usepackage{times}
%%%%usepackage{latexsym}
usepackage{graphicx}
usepackage{amsmath}
usepackage{amssymb}%%%{amsfonts}
usepackage{url}
usepackage{mathtools}
usepackage{verbatim}
usepackage[utf8]{inputenc}
usepackage[T1]{fontenc}

usepackage[shellescape]{gmp}
usepackage{dot2texi}

usepackage{natbib}
usepackage{caption}
usepackage{subcaption}
usepackage{wrapfig}
usepackage{multirow}
usepackage{pgfplots}
usepackage{filecontents}
usepackage{subfiles}
usepackage{readarray}
usepackage{xcolor}
usepackage{import}

usepackage{tikz}
%%%%usepackage{tikz}
usepackage{tikz-dependency}
%%%%usepackage{tikz-dependency}
usetikzlibrary{shapes,arrows}
usetikzlibrary{matrix,positioning}
usetikzlibrary{automata,arrows}
usetikzlibrary{calc}

%usepackage{ifthen}
%usepackage{subfiles}
%subfile{graphs/q_value.tex}

begin{document}
tikzstyle{line}=[bend right=30,thin]
pgfmathsetmacromyscale{0.95}

begin{figure}
%centering
%The first part of figure
begin{minipage}[]{.60textwidth}
begin{subfigure}[]{0.475textwidth}
%%%centering
includegraphics[width=textwidth,height=textwidth]{example-image-a}
caption*{(1) 1st iteration}
end{subfigure}%
%%%
hfill
begin{subfigure}[]{0.475textwidth}
%%%centering
includegraphics[width=textwidth,height=textwidth]{example-image-a}
caption*{(2) 2nd iteration}
end{subfigure}

bigskip
begin{subfigure}[]{0.475textwidth}
%%%centering
includegraphics[width=textwidth,height=textwidth]{example-image-a}
caption*{(3) 3rd iteration}
end{subfigure}%
%%%
hfill
begin{subfigure}[]{0.475textwidth}
%%%centering
includegraphics[width=textwidth,height=textwidth]{example-image-a}
caption*{(4) Final prediction}
end{subfigure}
end{minipage}%
%%%%%%
hfill
begin{minipage}[]{.38textwidth} %Second part of figure
begin{subfigure}[]{textwidth}
centering
begin{dependency}[theme = simple]
begin{deptext}[column sep=3mm, font=normalsize]
They & were & not & Poles \
end{deptext}
deproot[thick,dotted,edge height=30pt]{2}{normalsize <ROOT>}
deproot[red, edge height=30pt]{4}{normalsize <ROOT>}
%depedge[]{1}{2}{}
depedge[thick,dotted]{2}{1}{}
depedge[thick,dotted]{2}{3}{}
depedge[]{2}{4}{}
end{dependency}
caption*{(1) 1st iteration}
end{subfigure}

medskip
begin{subfigure}[]{textwidth}
centering
begin{dependency}[theme = simple]
begin{deptext}[column sep=0.3cm, font=normalsize]
They & were & not & Poles \
end{deptext}
deproot[thick,dotted,edge height=30pt]{2}{normalsize <ROOT>}
%deproot[edge height=30pt]{3}{normalsize ROOT}
%depedge[]{1}{2}{}
depedge[thick,dotted]{2}{1}{}
depedge[thick,dotted]{2}{3}{}
depedge[thick,dotted]{2}{4}{}
end{dependency}
caption*{(2) 2nd iteration}
end{subfigure}

medskip
begin{subfigure}[]{textwidth}
centering
begin{dependency}[theme = simple]
begin{deptext}[column sep=0.3cm, font=normalsize]
They & were & not & Poles \
end{deptext}
deproot[edge height=30pt]{2}{normalsize <ROOT>}
%deproot[edge height=30pt]{3}{normalsize ROOT}
%depedge[]{1}{2}{}
depedge[thick,dotted]{2}{1}{}
depedge[thick,dotted]{2}{3}{}
depedge[]{2}{4}{}
end{dependency}
caption*{(3) 3rd iteration}
end{subfigure}

medskip
begin{subfigure}[]{textwidth}
centering
begin{dependency}[theme = simple]
begin{deptext}[column sep=0.3cm, font=normalsize]
They & were & not & Poles \
end{deptext}
deproot[edge height=30pt]{2}{normalsize <ROOT>}
%deproot[edge height=30pt]{3}{normalsize ROOT}
%depedge[]{1}{2}{}
depedge[]{2}{1}{}
depedge[]{2}{3}{}
depedge[]{2}{4}{}
end{dependency}
caption*{(4) Final prediction}
end{subfigure}
end{minipage}


caption{}
    label{fig:example}
end{figure}

end{document}