Volkov-Yartsev VYa-23
Volkov-Yartsev VYa-23 ( Волков-Ярцев ВЯ-23 ) is a autocannon used on Soviet aircraft during World War II . 
<triplet> Volkov-Yartsev VYa-23 <subj> autocannon <obj> instance of <subj> World War II <obj> conflict