Man pages matching name web::machine::util::contentnegotiation in section 3pm:

Web::Machine::Util::ContentNegotiation.3pm.en	debian 10 / libweb-machine-perl
Web::Machine::Util::ContentNegotiation.3pm.en	debian 11 / libweb-machine-perl
Web::Machine::Util::ContentNegotiation.3pm.en	debian 12 / libweb-machine-perl