premise: Jovan Šević or Ivan Šević (Serbian: Јован Шевић , Russian: Иван Егорович Шевич ; died  1764 ) was an 18th-century military officer of Serb origin.
hypothesis: Jovan Šević Serbian : : Јован Шевић, Russian : : Иван Егорович Шевич : ; died 1764 was an 18th - century military officer of Serb origin.