Complex sentence: The ZSU-57-2 (Ob'yekt 500) is a Soviet self-propelled anti-aircraft gun (SPAAG), armed with two 57 mm autocannons.
Split into simpler sentences: The ZSU-57-2 (Ob'yekt 500) is a Soviet self-propelled anti-aircraft gun (SPAAG). It is armed with two 57 mm autocannons.