user: Question: What is the subject when the highest mark is 79?
Columns: ['Subject', 'No. Sat', 'No. Passed', '% Pass', 'Highest mark', 'Lowest mark', 'Mean']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['English', 55.0, 46.0, 84.0, 100.0, 37.0, 59.0]
SQL:

assistant: SELECT "Subject" FROM "Table" WHERE "Highest mark" = 79.0;