user: Question: What is the Mainly For with a displacement of 997 cc in a year before 1962?
Columns: ['Type', 'Year', 'Block', 'Displacement', 'Mainly For']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Mk.I', 1959.0, '105/107E', '997 cc', 'Development of A2 and A3 camshaft']
SQL:

assistant: SELECT "Mainly For" FROM "Table" WHERE "Year" < 1962.0 AND "Displacement" = '997 cc';