user: ### NOW ANSWER:
Question: Which Yellow Cards has a Season of 1999/2000?
Columns: ['Season', 'Games', 'Yellow Cards', 'Red Cards', 'Average Cards a game']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['1997/1998', 38.0, 140.0, 8.0, 3.9]
SQL:

assistant: SELECT AVG("Yellow Cards") FROM "Table" WHERE "Season" = '1999/2000';