If the NFL team is the Houston Oilers and the position is DT, who is the Pro team?
CREATE TABLE "third_round" (
  "pick_num" real,
  "nfl_team" text,
  "player" text,
  "position" text,
  "pro_team" text,
  "college" text
);
SELECT "pro_team" FROM "third_round" WHERE "position"='DT' AND "nfl_team"='Houston Oilers';