user: Question: In what Season is Necaxa an Opponent?
Columns: ['Date', 'Season', 'Playing for', 'Opponent', 'Final score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['16 September 2009', '2009–10 A', 'Motagua', 'Platense', '2 – 2 D']
SQL:

assistant: SELECT "Season" FROM "Table" WHERE "Opponent" = 'Necaxa';