user: ### NOW ANSWER:
Question: Which Year has a cause of firedamp and a Death toll larger than 11?
Columns: ['Colliery', 'Location', 'Date', 'Year', 'Death toll', 'cause']
Types: ['text', 'text', 'text', 'real', 'real', 'text']
Sample row: ['Dinas Colliery', 'Dinas', '1 January', 1844.0, 12.0, 'gas explosion']
SQL:

assistant: SELECT SUM("Year") FROM "Table" WHERE "cause" = 'firedamp' AND "Death toll" > 11.0;