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: Which of the offices that Charles E. Vreeland worked at is the oldest? Passage:Vreeland was further promoted to master and then lieutenant after successive tours of duty on board the screw steamer , the gunboat and the sloop-of-war . He was then assigned to the Nautical Almanac Office of the US Naval Observatory in November 1881 after a brief period ashore awaiting orders. In March 1884, Lt. Vreeland began a three-year tour at sea aboard the sloop-of-war , after which he was assigned for two years at the Bureau of Navigation. He was then assigned briefly (from July to September 1889) with the Office of Naval Intelligence and reported to the Coast Survey late in October, a posting he took until the spring of 1893, when Vreeland was assigned a series of tours as naval attaché — first in Rome, Vienna and finally in Berlin.


b