user: Question: what's the naturalisation  by marriage with numer of jamaicans granted british citizenship being 3165
Columns: ['Year', 'Numer of Jamaicans granted British citizenship', 'Naturalisation by residence', 'Naturalisation by marriage', 'Registration of a minor child', 'Registration by other means']
Types: ['real', 'real', 'real', 'real', 'real', 'real']
Sample row: [1997.0, 732.0, 327.0, 279.0, 114.0, 12.0]
SQL:

assistant: SELECT "Naturalisation by marriage" FROM "Table" WHERE "Numer of Jamaicans granted British citizenship" = 3165.0;