Conversation so far:
When did Carl Nielsen get married?
Carl Nielsen and Anne Marie Brodersen toured Italy together and married in St Mark's English Church, Florence, on 10 May 1891 before returning to Denmark.
What is Carl Nielsen's wife's name?
Carl Nielsen's wife was Anne Marie Brodersen.

Question: How many children did they have?
Self-contained rewrite: How many children did Carl Nielsen and Anne Marie Brodersen have?