user: Question: Tell me the class with rank of 89th
Columns: ['Year', 'Team', 'Make', 'Engine', 'Class', 'Rank', 'Points']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [2005.0, 'Newman Racing/Silverstone Racing', 'Crawford DP03', 'Ford', 'DP', '89th', 6.0]
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Rank" = '89th';