Question: When has a cause of gas explosion, a Death toll smaller than 63, and a Location of Penygraig?
SQL: SELECT "Date" FROM "2-1808199-2" WHERE "cause" = 'gas explosion' AND "Death toll" < 63.0 AND "Location" = 'Penygraig';

Question: Where has a cause of gas explosion, a Death toll larger than 38 on 10 June?
SQL: SELECT "Location" FROM "2-1808199-2" WHERE "cause" = 'gas explosion' AND "Death toll" > 38.0 AND "Date" = '10 June';

Question: Which Year has a Location of Dinas on 13 January?
SQL: SELECT "Year" FROM "2-1808199-2" WHERE "Location" = 'Dinas' AND "Date" = '13 January';

Question: Which Year has a cause of firedamp and a Death toll larger than 11?
SQL: SELECT SUM("Year") FROM "2-1808199-2" WHERE "cause" = 'firedamp' AND "Death toll" > 11.0;

Question: Count the lowest Year which has gas explosion, Colliery of tylorstown colliery, and a Death toll larger than 57?
SQL: SELECT MIN("Year") FROM "2-1808199-2" WHERE "cause" = 'gas explosion' AND "Colliery" = 'tylorstown colliery' AND "Death toll" > 57.0;

Question: Which Colliery has a Death toll of 7?
SQL: SELECT "Colliery" FROM "2-1808199-2" WHERE "Death toll" = 7.0;