Question: Mashujaa Day is observed on 20 October commemorates the detention of freemdom fighters including the country's first what?
Sentence (from "Heroes' Day (Kenya)"): It was previously known as Kenyatta Day, which was celebrated to commemorate the detention in Kapenguria of freedom fighters Achieng' Oneko, Bildad Kaggia, Fred Kubai, Jomo Kenyatta, Kung'u Karumba and Paul Ngei, often referred to as the Kapenguria Six.
Relevant evidence: Yes