Man pages matching name poe::component::irc::plugin::whois in section 3pm:

POE::Component::IRC::Plugin::Whois.3pm.en	debian 10 / libpoe-component-irc-perl
POE::Component::IRC::Plugin::Whois.3pm.en	debian 11 / libpoe-component-irc-perl
POE::Component::IRC::Plugin::Whois.3pm.en	debian 12 / libpoe-component-irc-perl