Question: Who won the ncaa women's softball championship this year?

Disambiguated questions and answers:
context: The 2018 NCAA Division I Softball Tournament was held from May 18 through June 6, 2018 as the final part of the 2018 NCAA Division I softball season. Thirty-two teams were awarded automatic bids as champions of their conferences, and the remaining 32 were selected at-large by the NCAA Division I softball selection committee. The tournament culminated with eight teams playing in the 2018 Women's College World Series at ASA Hall of Fame Stadium in Oklahoma City. This was the first year since the 2010 Women's College World Series that neither the Florida Gators nor the Oklahoma Sooners made the Championship Series. The Florida State Seminoles played in their first Women's College World Series Championship Series and became the first ACC team to make the Championship Series. The Washington Huskies made their fourth appearance in the Championship Series. 
question: Who won the 2017 NCAA women's softball championship?
short_answers: Oklahoma
wikipage: 2018 NCAA Division I Softball Tournament

context: The 2018 NCAA Division I Softball Tournament was held from May 18 through June 6, 2018 as the final part of the 2018 NCAA Division I softball season. Thirty-two teams were awarded automatic bids as champions of their conferences, and the remaining 32 were selected at-large by the NCAA Division I softball selection committee. The tournament culminated with eight teams playing in the 2018 Women's College World Series at ASA Hall of Fame Stadium in Oklahoma City. This was the first year since the 2010 Women's College World Series that neither the Florida Gators nor the Oklahoma Sooners made the Championship Series. The Florida State Seminoles played in their first Women's College World Series Championship Series and became the first ACC team to make the Championship Series. The Washington Huskies made their fourth appearance in the Championship Series. 
question: Who won the 2016 NCAA women's softball championship?
short_answers: Oklahoma
wikipage: 2018 NCAA Division I Softball Tournament

context: The 2018 NCAA Division I Softball Tournament was held from May 18 through June 6, 2018 as the final part of the 2018 NCAA Division I softball season. Thirty-two teams were awarded automatic bids as champions of their conferences, and the remaining 32 were selected at-large by the NCAA Division I softball selection committee. The tournament culminated with eight teams playing in the 2018 Women's College World Series at ASA Hall of Fame Stadium in Oklahoma City. This was the first year since the 2010 Women's College World Series that neither the Florida Gators nor the Oklahoma Sooners made the Championship Series. The Florida State Seminoles played in their first Women's College World Series Championship Series and became the first ACC team to make the Championship Series. The Washington Huskies made their fourth appearance in the Championship Series. 
question: Who won the 2015 NCAA women's softball championship?
short_answers: Florida
wikipage: 2018 NCAA Division I Softball Tournament

Long answers:
knowledge: content: The Women's College World Series (WCWS) is the final portion of the NCAA Division I Softball Championship for college softball in the United States.
wikipage: Women's College World Series
long_answer: The Women's College World Series (WCWS) is the final portion of the NCAA Division I Softball Championship for college softball in the United States. Florida won the Women's College World Series in 2015. Oklahoma won in 2016 and 2017.