What was the highest number of rounds that had Hikaru Shinohara as an opponent and a record of 11-7?
CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "round" real,
  "time" text
);
SELECT MAX("round") FROM "mixed_martial_arts_record" WHERE "opponent"='hikaru shinohara' AND "record"='11-7';