Which is the lowest Round with the Opponent, Paul Cahoon and Location, Amsterdam, Netherlands?
CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "event" text,
  "round" real,
  "time" text,
  "location" text
);
SELECT MIN("round") FROM "mixed_martial_arts_record" WHERE "opponent"='paul cahoon' AND "location"='amsterdam, netherlands';