Conversation so far:
Was Julian Assange married?
While in his teens, Assange married a woman named Teresa.
what year did Julian Assange first marry?
Did Julian Assange and Teresa have children?
In 1989 they had a son, Daniel.
Did Julian Assange and Teresa stay together?
The couple separated and initially disputed custody of their child.

Question: when did they separate?
Self-contained rewrite: When did Julian Assange and Teresa separate?