Complex sentence: Team management was left to Effa, making the Eagles the first professional team owned and operated by a woman, and under her guidance the 1946 team won the Negro League World Series, upsetting the Kansas City Monarchs in a 7-game series.
Split into simpler sentences: Team management was left to Effa, making the Eagles the first professional team owned and operated by a woman. Under Effa Manley's guidance, the 1946 team won the Negro League World Series, upsetting the Kansas City Monarchs in a 7-game series.