Question: Who won the 2018 national championship college football?
Disambiguated questions and answers: question: Who won the 2018 National Championship game in College football for the season that took place in 2017?
Who won the National Championship in College football for the season that took place in 2018?
answer: Alabama Crimson Tide
Clemson Tigers
Natural Questions answer: The Alabama Crimson Tide (from the Wikipedia article "2018 College Football Playoff National Championship")