user: Question: What Competition had a game on October 31, 1979?
Columns: ['Date', 'Result', 'Score', 'Brazil scorers', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['May 17, 1979', 'W', '6-0', 'Éder , Zico (3), Nílton Batata (2)', 'International Friendly']
SQL:

assistant: SELECT "Competition" FROM "Table" WHERE "Date" = 'October 31, 1979';