Table: imsa_race_data_2
Columns: race
length
class
circuit
date

Question: Name the length for class of gts-2 and date of october 8
SQL: SELECT "length" FROM imsa_race_data_2 WHERE "class" = 'gts-2' AND "date" = 'october 8'

Question: Name the circuit with class of gts
SQL: SELECT "circuit" FROM imsa_race_data_2 WHERE "class" = 'gts'

Question: Name the length for all class and date of march 18
SQL: SELECT "length" FROM imsa_race_data_2 WHERE "class" = 'all' AND "date" = 'march 18'