user: Question: Which entrant has 49 points and a McLaren M7A chassis?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Tyres', 'Points']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1963.0, 'Canadian Stebro Racing', 'Stebro Mk IV', '109E 1.5 L4', 'D', '0']
SQL:

assistant: SELECT "Entrant" FROM "Table" WHERE "Points" = '49' AND "Chassis" = 'McLaren M7A';