Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Problem:Context : Andrzej Jastrzebiec, also known as Andrzej Wasilko or Andrzej Polak, (died 1398) was a Polish Catholic priest and diplomat, a first bishop of Seret and of Vilnius.
Question : On what date did Andrzej Jastrzebiec die?
Solution:
1398