Conversation so far:
What happened during Apartheid?
Winnie was regularly detained by the National Party government.
She was tortured, subjected to house arrest, kept under surveillance, held in solitary confinement for over a year and.
And what else?
and even banished to a remote town.
She emerged as a leading opponent of apartheid during the later years of her husband's imprisonment.

Question: What did she do to fight Apartheid?
Self-contained rewrite: What did Winnie do to fight Apartheid during the later years of her husband's imprisonment?