CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "event" text,
  "round" text,
  "time" text,
  "location" text
);

Question: Name the opponent with round of 1 and time of n/a
SQL: SELECT "opponent" FROM "mixed_martial_arts_record" WHERE "round"='1' AND "time"='n/a';

Question: Name the record with opponent of christian nielson
SQL: SELECT "record" FROM "mixed_martial_arts_record" WHERE "opponent"='christian nielson';

Question: Name the opponent with decision
SQL: SELECT "opponent" FROM "mixed_martial_arts_record" WHERE "method"='decision';