How may championships were won by the team that started in 1950?
CREATE TABLE table_21564794_3 (
    championships_in_st_louis VARCHAR,
    began_in_st_louis VARCHAR
)
SELECT championships_in_st_louis FROM table_21564794_3 WHERE began_in_st_louis = 1950
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How may championships were won by the team that started in 1950? ### Input: CREATE TABLE table_21564794_3 (
    championships_in_st_louis VARCHAR,
    began_in_st_louis VARCHAR
) ### Response: SELECT championships_in_st_louis FROM table_21564794_3 WHERE began_in_st_louis = 1950