Conversation so far:
When was Jimmy Fallon born?
Jimmy Fallon was born September 19, 1974.
Was Jimmy ever married?
Jimmy Fallon is married to film producer Nancy Juvonen.
When did he get married?
Jimmy Fallon married film producer Nancy Juvonen on December 22, 2007.
Does Jimmy Fallon have any children?
Jimmy Fallon has two daughters.
What are Jimmy Fallon's childrens' names?
Jimmy Fallon's daughters are Winnie Rose and Frances Cole.
What are Jimmy Fallon's personal interests?
Jimmy Fallon grew up with an interest in comedy and music

Question: What caused that?
Self-contained rewrite: What caused Jimmy Fallon's ring avulsion?