Regular expression for parsing authors information from a scientic article
Aa Aaa 1, Bb Bbb 2  and Cc Ccc 1
1 Institut xx Xx, Some University, Xxxx 14, US-10000 NewYork, USA; E-Mails: aa.aaa@edu.com; cc.ccc@edu.com
2 Institut zz Zzz, Some University2, Zzzz 20, US-10000 NewYork, USA; E-Mail: bb.bbb@edu.com

Aa Aaa - Institut xx Xx, Some University, Xxxx 14, US-10000 NewYork, USA - aa.aaa@edu.com

Bb Bbb - Institut zz Zzz, Some University2, Zzzz 20, US-10000 NewYork, USA - bb.bbb@edu.com

Cc Ccc - Institut xx Xx, Some University, Xxxx 14, US-10000 NewYork, USA - cc.ccc@edu.com

$_ = "nn" . $input;
1 while s/^(.*?n?)n{1,2}s*([^d]+)s+(d+)s*?(?:s*and|[,ns])(.*?)(?<=n)(3s+)([^n]*)(n.*$|$)/$1$2 - $6nn$4$5$6$7/gs;
s/nn.*$//s;
print $_;