Question: Which causes did Yuri Kochiyama advocate that promoted this subcategory of black nationalism, stemming from the idea of racial solidarity?
Sentence (from "Yuri Kochiyama"): Yuri Kochiyama (河内山 百合子 , Kōchiyama Yuriko , May 19, 1921 – June 1, 2014) was an American activist.
Relevant evidence: No