user: Question: Count the lowest Year which has gas explosion, Colliery of tylorstown colliery, and a Death toll larger than 57?
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 "Year" FROM "Table" WHERE "cause" = 'gas explosion' AND "Colliery" = 'tylorstown colliery' AND "Death toll" > 57.0;