This is the revision history for perl regex in <matrix.org:#rAnyijhRxzFRfdjSHl:matrix.org>

factoid_idsubjectcopulapredicateauthornamespace
13609 perl regex is Learn Perl regex syntax: https://perldoc.pl/perlre https://perldoc.pl/perlretut , http://www.regular-expressions.info/lookaround.html simcop2387 <*:##NULL>
4583 perl regex is Learn Perl regex syntax: http://perldoc.perl.org/perlre.html http://perldoc.perl.org/perlretut.html , http://www.regular-expressions.info/lookaround.html perlbot <*:##NULL>