Which player made the highest number of assists during the game played at the FleetCenter, with end score of W 120-87?
CREATE TABLE "playoffs" (
  "game" real,
  "date" text,
  "team" text,
  "score" text,
  "high_points" text,
  "high_rebounds" text,
  "high_assists" text,
  "location_attendance" text,
  "series" text
);
SELECT "high_assists" FROM "playoffs" WHERE "location_attendance"='fleetcenter' AND "score"='w 120-87';