Conversation so far:
who was the winner of the fifa women's world cup 2015
The 2015 FIFA Women's World Cup Final finished with a United States victory over Japan.
which country hosted the fifa women's world cup 2015
The 2015 FIFA Womens World Cup tournament was hosted by Canada.
how many matches were in the fifa women's world cup 2015
The 2015 FIFA Womens World Cup tournament had 52 matches.

Question: why was the cup unique
Self-contained rewrite: why was the fifa women's world cup 2015 unique