/usr/share/perl5/WWW/ is in libwww-facebook-api-perl 0.4.18-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/WWW/Facebook/
/usr/share/perl5/WWW/Facebook/API/
/usr/share/perl5/WWW/Facebook/API.pm
/usr/share/perl5/WWW/Facebook/API/Admin.pm
/usr/share/perl5/WWW/Facebook/API/Application.pm
/usr/share/perl5/WWW/Facebook/API/Auth.pm
/usr/share/perl5/WWW/Facebook/API/Canvas.pm
/usr/share/perl5/WWW/Facebook/API/Comments.pm
/usr/share/perl5/WWW/Facebook/API/Connect.pm
/usr/share/perl5/WWW/Facebook/API/Data.pm
/usr/share/perl5/WWW/Facebook/API/Events.pm
/usr/share/perl5/WWW/Facebook/API/Exception.pm
/usr/share/perl5/WWW/Facebook/API/FBML.pm
/usr/share/perl5/WWW/Facebook/API/FQL.pm
/usr/share/perl5/WWW/Facebook/API/Feed.pm
/usr/share/perl5/WWW/Facebook/API/Friends.pm
/usr/share/perl5/WWW/Facebook/API/Groups.pm
/usr/share/perl5/WWW/Facebook/API/Intl.pm
/usr/share/perl5/WWW/Facebook/API/Links.pm
/usr/share/perl5/WWW/Facebook/API/LiveMessage.pm
/usr/share/perl5/WWW/Facebook/API/Message.pm
/usr/share/perl5/WWW/Facebook/API/Notes.pm
/usr/share/perl5/WWW/Facebook/API/Notifications.pm
/usr/share/perl5/WWW/Facebook/API/Pages.pm
/usr/share/perl5/WWW/Facebook/API/Permissions.pm
/usr/share/perl5/WWW/Facebook/API/Photos.pm
/usr/share/perl5/WWW/Facebook/API/Profile.pm
/usr/share/perl5/WWW/Facebook/API/SMS.pm
/usr/share/perl5/WWW/Facebook/API/Status.pm
/usr/share/perl5/WWW/Facebook/API/Stream.pm
/usr/share/perl5/WWW/Facebook/API/Users.pm
/usr/share/perl5/WWW/Facebook/API/Video.pm