Question: Where was the hoard of coins found that proved Ubouzanes was a Gondophare? 
Sentence (from "Indo-Parthian Kingdom"): The Indo-Parthian Kingdom was ruled by the Gondopharid dynasty and other rulers who were a group of ancient kings from Central Asia that ruled parts of present-day Afghanistan, Pakistan and northwestern India, during or slightly before the 1st century AD.
Relevant evidence: Yes