Conversation so far:
What happened to Winnie Madikizela-Mandela during Apartheid?
Winnie Mandela emerged as a leading opponent of apartheid during the latter part of her husband's imprisonment.
And what else happened to Winnie Madikizela-Mandela ?
Due to Winnie Madikizela-Mandela's political activities, she was regularly detained by the National Party government.

Question: What did she do to fight Apartheid?
Self-contained rewrite: What did Winnie Madikizela-Mandela do to fight Apartheid?