Table: t_1955_f1_race_2
Columns: race_name
circuit
date
winning_driver
constructor
report

Question: Who is the constructor whose circuit was Oulton Park?
SQL: SELECT "constructor" FROM t_1955_f1_race_2 WHERE "circuit" = 'oulton park'

Question: What is the name of the race for which the circuit was Snetterton?
SQL: SELECT "race_name" FROM t_1955_f1_race_2 WHERE "circuit" = 'snetterton'