user: Question: What numbr on the list had a peak rating of 42?
Columns: ['Rank', 'English title', 'Chinese title', 'Average', 'Peak', 'Premiere', 'Finale', 'HK viewers']
Types: ['real', 'text', 'text', 'real', 'real', 'real', 'real', 'text']
Sample row: [1.0, 'Moonlight Resonance', '溏心風暴之家好月圓', 35.0, 50.0, 33.0, 38.0, '2.22 million']
SQL:

assistant: SELECT "Rank" FROM "Table" WHERE "Peak" = 42.0;