Conversation so far:
What is the name of Karlheinz Stockhausen's wife ?
Doris Andreae.
When was he married to Doris Andreae ?
On 29 December 1951.
How many children did they have together ?
Together they had four children.

Question: Did he have any other wives ?
Self-contained rewrite: Did Stockhousen have any other wives aside from Doris Andreae ?