Conversation so far:
Why did Williams leave?
Robbie Williams's drug abuse had escalated to a near drug overdose.
What was the result of this?
CANNOTANSWER.
When did they break up?
On 13 February 1996, Take That formally announced that they were disbanding.

Question: When did they release their greatest hits?
Self-contained rewrite: When did Take That release their greatest hits?