Which event has a Method of submission (triangle choke), and an Opponent of thiago tavares?
CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "event" text,
  "round" text,
  "time" text
);
SELECT "event" FROM "mixed_martial_arts_record" WHERE "method"='submission (triangle choke)' AND "opponent"='thiago tavares';