Question: What round was the circuit Portland International Raceway?
SQL: SELECT "Round" FROM "2-16952105-1" WHERE "Circuit" = 'Portland International Raceway';

Question: When was the circuit Portland International Raceway?
SQL: SELECT "Date" FROM "2-16952105-1" WHERE "Circuit" = 'Portland International Raceway';

Question: Which round had a city/location of Toronto, Ontario?
SQL: SELECT "Round" FROM "2-16952105-1" WHERE "City/Location" = 'Toronto, Ontario';

Question: For which location was the round smaller than 11 and the circuit Streets of Denver?
SQL: SELECT "City/Location" FROM "2-16952105-1" WHERE "Round" < 11.0 AND "Circuit" = 'Streets of Denver';

Question: What day was the location Cleveland, Ohio in Round 6?
SQL: SELECT "Date" FROM "2-16952105-1" WHERE "City/Location" = 'Cleveland, Ohio' AND "Round" = 6.0;