use strict;
my $str = 'Yes – No – No – No
Yes – No – No & No – No
Yes Yes – No & No – No
Yes – No – No & No
Yes – No
Yes – No – No';
my $regex = qr/ *–.*/p;
my $subst = '';
my $result = $str =~ s/$regex/$subst/rg;
print "The result of the substitution is' $result\n";
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html