Complex sentence: Varkaris worship Vithoba (also known as Vitthal), the presiding deity of Pandharpur, who is identified with Krishna, an "avatar" (incarnation) of Vishnu.
Split into simpler sentences: Varkaris worship Vithoba (also known as Vitthal), the presiding deity of Pandharpur. Vithoba is a form of Krishna, an "avatar" (incarnation) of Vishnu.