user: Question: What 1976 has a 1978 of Grand Slam tournaments?
Columns: ['Tournament', '1973', '1974', '1975', '1976', '1977', '1978', '1979', '1983', '1984', '1985', '1986']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments', 'Grand Slam tournaments']
SQL:

assistant: SELECT "1976" FROM "Table" WHERE "1978" = 'Grand Slam tournaments';