Complex sentence: Other important reserve stay in Karaganda more near at Magnitogorsk (Magnet City) Higt Ovens, its production in 1937 was 3,937,200 tonnes.
Split into simpler sentences: Other important reserve stay in Karaganda near Magnitogorsk (Magnet City) Higt Ovens. Its production in 1937 was 3,937,200 tonnes.