user: Question: What was the lowest year for TCU?
Columns: ['Year', 'Winner', 'Score', 'Opponent', 'Location']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1991.0, 'Utah', '86-69', 'Creighton', 'Arena-Auditorium ( Laramie, Wyoming )']
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Winner" = 'TCU';