CREATE TABLE table_21564794_3 (championships_in_st_louis VARCHAR2, began_in_st_louis VARCHAR2)

How may championships were won by the team that started in 1950?
SELECT championships_in_st_louis FROM table_21564794_3 WHERE began_in_st_louis = 1950
SELECT "championships_in_st_louis" FROM "table_21564794_3" WHERE "began_in_st_louis" = 1950