What year did Negro American League join?
CREATE TABLE table_21564794_3 (began_in_st_louis INTEGER, league VARCHAR)
SELECT MIN(began_in_st_louis) FROM table_21564794_3 WHERE league = "Negro American league"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21564794_3 (began_in_st_louis INTEGER, league VARCHAR) Question: What year did Negro American League join? [/INST] SELECT MIN(began_in_st_louis) FROM table_21564794_3 WHERE league = "Negro American league" </s>