Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_87 (year INTEGER, cause VARCHAR, death_toll VARCHAR)
### Question:
Which Year has a cause of firedamp and a Death toll larger than 11?
### Answer:
SELECT SUM(year) FROM table_name_87 WHERE cause = "firedamp" AND death_toll > 11