Question: What is the sum of the rounds of the match with Brett Chism as the opponent?
SQL: SELECT SUM("Round") FROM "2-18053227-2" WHERE "Opponent" = 'Brett Chism';

Question: What is the lwoest round of Wild Bill's Fight Night 21 at 5:00?
SQL: SELECT MIN("Round") FROM "2-18053227-2" WHERE "Time" = '5:00' AND "Event" = 'Wild Bill''s Fight Night 21';