Question: Who was the opponent in UFC 19?
SQL: SELECT "Opponent" FROM "2-1715880-3" WHERE "Event" = 'UFC 19';

Question: Who was the opponent in UFC 66 who lasted for more than 1 round?
SQL: SELECT "Opponent" FROM "2-1715880-3" WHERE "Round" > 1.0 AND "Event" = 'UFC 66';