Table: imsa_1982_race_data
Columns: race
length
class
circuit
date

Question: What is the date of the Mosport Park circuit?
SQL: SELECT "date" FROM imsa_1982_race_data WHERE "circuit" = 'mosport park'

Question: What is the length of the Laguna Seca Raceway circuit with a class of gtu?
SQL: SELECT "length" FROM imsa_1982_race_data WHERE "circuit" = 'laguna seca raceway' AND "class" = 'gtu'

Question: What is the class of the Charlotte Camel gt 500 race?
SQL: SELECT "class" FROM imsa_1982_race_data WHERE "race" = 'charlotte camel gt 500'

Question: What is the length of the race on August 15?
SQL: SELECT "length" FROM imsa_1982_race_data WHERE "date" = 'august 15'