What is the points that is more than 636 and has a value of 50?
CREATE TABLE "players" (
  "nationality" text,
  "no_a" text,
  "pos_a" text,
  "from" text,
  "school_club" text,
  "pts_b" real,
  "reb_b" real,
  "ast_b" real
);
SELECT "pts_b" FROM "players" WHERE "reb_b">636 AND "no_a"='50';