rdepends

 apt-cache policy $(apt-rdepends libqt4-dbus:i386 2>/dev/null | grep "^[a-zA-Z]" | sort | paste -s -d" ")
gcc-5-base:
  Installed: 5.4.0-6ubuntu1~16.04.2
  Candidate: 5.4.0-6ubuntu1~16.04.2
  Version table:
 *** 5.4.0-6ubuntu1~16.04.2 100
        100 /var/lib/dpkg/status
     5.3.1-14ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
gcc-6-base:
  Installed: 6.0.1-0ubuntu1
  Candidate: 6.0.1-0ubuntu1
  Version table:
 *** 6.0.1-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libc6:
  Installed: 2.23-0ubuntu3
  Candidate: 2.23-0ubuntu3
  Version table:
 *** 2.23-0ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libdbus-1-3:
  Installed: 1.10.6-1ubuntu3.1
  Candidate: 1.10.6-1ubuntu3.1
  Version table:
 *** 1.10.6-1ubuntu3.1 100
        100 /var/lib/dpkg/status
     1.10.6-1ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
libffi6:
  Installed: 3.2.1-4
  Candidate: 3.2.1-4
  Version table:
 *** 3.2.1-4 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libgcc1:
  Installed: 1:6.0.1-0ubuntu1
  Candidate: 1:6.0.1-0ubuntu1
  Version table:
 *** 1:6.0.1-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libgcrypt20:
  Installed: 1.6.5-2ubuntu0.2
  Candidate: 1.6.5-2ubuntu0.2
  Version table:
 *** 1.6.5-2ubuntu0.2 100
        100 /var/lib/dpkg/status
     1.6.5-2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
libglib2.0-0:
  Installed: 2.48.1-1~ubuntu16.04.1
  Candidate: 2.48.1-1~ubuntu16.04.1
  Version table:
 *** 2.48.1-1~ubuntu16.04.1 100
        100 /var/lib/dpkg/status
     2.48.0-1ubuntu4 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
libgpg-error0:
  Installed: 1.21-2ubuntu1
  Candidate: 1.21-2ubuntu1
  Version table:
 *** 1.21-2ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
liblzma5:
  Installed: 5.1.1alpha+20120614-2ubuntu2
  Candidate: 5.1.1alpha+20120614-2ubuntu2
  Version table:
 *** 5.1.1alpha+20120614-2ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libpcre3:
  Installed: 2:8.38-3.1
  Candidate: 2:8.38-3.1
  Version table:
 *** 2:8.38-3.1 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libqt4-dbus:i386:
  Installed: (none)
  Candidate: 4:4.8.7+dfsg-5ubuntu2
  Version table:
     4:4.8.7+dfsg-5ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages
libqt4-xml:
  Installed: 4:4.8.7+dfsg-5ubuntu2
  Candidate: 4:4.8.7+dfsg-5ubuntu2
  Version table:
 *** 4:4.8.7+dfsg-5ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libqtcore4:
  Installed: 4:4.8.7+dfsg-5ubuntu2
  Candidate: 4:4.8.7+dfsg-5ubuntu2
  Version table:
 *** 4:4.8.7+dfsg-5ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libqtdbus4:
  Installed: 4:4.8.7+dfsg-5ubuntu2
  Candidate: 4:4.8.7+dfsg-5ubuntu2
  Version table:
 *** 4:4.8.7+dfsg-5ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libselinux1:
  Installed: 2.4-3build2
  Candidate: 2.4-3build2
  Version table:
 *** 2.4-3build2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
libstdc++6:
  Installed: 5.4.0-6ubuntu1~16.04.2
  Candidate: 5.4.0-6ubuntu1~16.04.2
  Version table:
 *** 5.4.0-6ubuntu1~16.04.2 100
        100 /var/lib/dpkg/status
     5.3.1-14ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
libsystemd0:
  Installed: 229-4ubuntu10
  Candidate: 229-4ubuntu10
  Version table:
 *** 229-4ubuntu10 100
        100 /var/lib/dpkg/status
     229-4ubuntu4 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
multiarch-support:
  Installed: 2.23-0ubuntu3
  Candidate: 2.23-0ubuntu3
  Version table:
 *** 2.23-0ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
qdbus:
  Installed: 4:4.8.7+dfsg-5ubuntu2
  Candidate: 4:4.8.7+dfsg-5ubuntu2
  Version table:
 *** 4:4.8.7+dfsg-5ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
qtchooser:
  Installed: 52-gae5eeef-2build1~gcc5.2
  Candidate: 52-gae5eeef-2build1~gcc5.2
  Version table:
 *** 52-gae5eeef-2build1~gcc5.2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
qtcore4-l10n:
  Installed: 4:4.8.7+dfsg-5ubuntu2
  Candidate: 4:4.8.7+dfsg-5ubuntu2
  Version table:
 *** 4:4.8.7+dfsg-5ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages
        100 /var/lib/dpkg/status
zlib1g:
  Installed: 1:1.2.8.dfsg-2ubuntu4
  Candidate: 1:1.2.8.dfsg-2ubuntu4
  Version table:
 *** 1:1.2.8.dfsg-2ubuntu4 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status