Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.
Input: Question: How old was Mieszko when he died? Passage:Mieszko I, Duke of Cieszyn, the first ruler of the duchy, died in 1315 and afterwards his sons divided its land into two parts alongside Biaa River: diminished Duchy of Teschen to west and Duchy of Oswiecim to east. In the middle of the 15th century Duchy of Oswiecim was bought into the Crown of the Kingdom of Poland and so the river constituted henceforth the border between Polish and the Bohemian Crown (since 1526 part of the Habsburg Monarchy). Upon the First Partition of Poland in 1772 the river ceased to be a state border and continued as a regional border between Austrian Silesia to the west and Galicia to the east. After World War I and the 1919 PolishCzechoslovak War it separated the Polish part of Cieszyn Silesia in the Autonomous Silesian Voivodeship from Lesser Polish Krakow Voivodeship.

Output:
b