user: Question: What is the lap number for the rank of 13?
Columns: ['Year', 'Start', 'Qual', 'Rank', 'Finish', 'Laps']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['1951', '18', '133.839', '13', '28', 30.0]
SQL:

assistant: SELECT "Laps" FROM "Table" WHERE "Rank" = '13';