Table: f1_1957_season
Columns: race
circuit
date
pole_position
fastest_lap
winning_driver
constructor
report

Question: What driver was the winner when constructor was Maserati at the Monaco grand prix?
SQL: SELECT "winning_driver" FROM f1_1957_season WHERE "constructor" = 'maserati' AND "race" = 'monaco grand prix'

Question: What circuit did Juan Manuel Fangio have the fastest lap at the german grand prix?
SQL: SELECT "circuit" FROM f1_1957_season WHERE "fastest_lap" = 'juan manuel fangio' AND "race" = 'german grand prix'

Question: What circuit was for the german grand prix?
SQL: SELECT "circuit" FROM f1_1957_season WHERE "race" = 'german grand prix'