 Complete the following phrase:  Kiszka was also sent to diplomatic missions to Poland in 1492, 1495, and 1496. In August 1492, he represented Grand Duke Alexander at the Sejm of the Kingdom of Poland where Alexanders brother John I Albert was elected as King. In 1501, Kiszka supported the proposed Union of Mielnik which would have united Poland and Lithuania into a single state. The union was inspired by the continuing MuscoviteLithuanian Wars, particularly the defeat in the 