Table: f1_1950
Columns: entrant
constructor
chassis
driver
rounds

Question: Who is the drive for an Entrant of Scuderia Ambrosiana?
SQL: SELECT "driver" FROM f1_1950 WHERE "entrant" = 'scuderia ambrosiana'

Question: Which of the Rounds has an Entrant of automobiles Talbot-Darracq, and Pierre Levegh as the driver?
SQL: SELECT "rounds" FROM f1_1950 WHERE "entrant" = 'automobiles talbot-darracq' AND "driver" = 'pierre levegh'

Question: Who is the driver for the Entract of Enrico Platé?
SQL: SELECT "driver" FROM f1_1950 WHERE "entrant" = 'enrico platé'

Question: Which of the entrants had Luigi Fagioli as a driver?
SQL: SELECT "entrant" FROM f1_1950 WHERE "driver" = 'luigi fagioli'

Question: Who is the driver whose Constructor was Era, and whose entrant was T.A.S.O. Mathieson?
SQL: SELECT "driver" FROM f1_1950 WHERE "constructor" = 'era' AND "entrant" = 't.a.s.o. mathieson'

Question: Which chassis had Rounds of 7, and an Entrant of Ecurie Rosier?
SQL: SELECT "chassis" FROM f1_1950 WHERE "rounds" = '7' AND "entrant" = 'ecurie rosier'