Which Pick # has a League from of ontario hockey league, a Nationality of united states, and a Team from of brampton battalion?
CREATE TABLE "round_two" (
  "pick_num" real,
  "player" text,
  "nationality" text,
  "position" text,
  "team_from" text,
  "league_from" text
);
SELECT COUNT("pick_num") FROM "round_two" WHERE "league_from"='ontario hockey league' AND "nationality"='united states' AND "team_from"='brampton battalion';