Table: argentinagp_1971
Columns: race_name
circuit
date
winning_driver
constructor
report

Question: What circuit did Clay Regazzoni win?
SQL: SELECT "circuit" FROM argentinagp_1971 WHERE "winning_driver" = 'Clay Regazzoni'

Question: What was the date when Chris Amon won?
SQL: SELECT "date" FROM argentinagp_1971 WHERE "winning_driver" = 'Chris Amon'

Question: What circuit is the Vi Rhein-Pokalrennen race in?
SQL: SELECT "circuit" FROM argentinagp_1971 WHERE "race_name" = 'VI Rhein-Pokalrennen'