How may championships were won by the team that started in 1950?
CREATE TABLE "former_teams" (
  "team" text,
  "sport" text,
  "league" text,
  "established" real,
  "began_in_st_louis" real,
  "venue" text,
  "championships_in_st_louis" text,
  "left_st_louis" real
);
SELECT "championships_in_st_louis" FROM "former_teams" WHERE "began_in_st_louis"=1950;