Which Attendance has an Opponent of @ phoenix, and a Leading Scorer of sophia young (18)?
CREATE TABLE "season_schedule" (
  "date" text,
  "opponent" text,
  "score" text,
  "leading_scorer" text,
  "attendance" real,
  "record" text
);
SELECT MAX("attendance") FROM "season_schedule" WHERE "opponent"='@ phoenix' AND "leading_scorer"='sophia young (18)';