What was the total time for the match that ocurred in Round 3 with opponent Keith Wisniewski?
CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "round" text,
  "time" text,
  "location" text
);
SELECT "time" FROM "mixed_martial_arts_record" WHERE "round"='3' AND "opponent"='keith wisniewski';