Question: When did Ken Wiwa's father die?
Sentence (from "Ken Saro-Wiwa"): Saro-Wiwa was a member of the Ogoni people, an ethnic minority in Nigeria whose homeland, Ogoniland, in the Niger Delta has been targeted for crude oil extraction since the 1950s and which has suffered extreme environmental damage from decades of indiscriminate petroleum waste dumping.
Relevant evidence: No