Man pages matching name sem_overview in section 7:

sem_overview.7.en	debian 10 / manpages
sem_overview.7.ja	debian 10 / manpages-ja
sem_overview.7.en	debian 11 / manpages
sem_overview.7.fr	debian 11 / manpages-fr
sem_overview.7.ja	debian 11 / manpages-ja
sem_overview.7.en	debian 12 / manpages
sem_overview.7.fr	debian 12 / manpages-fr
sem_overview.7.ja	debian 12 / manpages-ja
sem_overview.7.ru	debian 12 / manpages-ru