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 long after the start of the First Sino-Japanese War did the Battle of the Yalu River take place? Passage:As an ensign, Ogasawara served in combat during the First Sino-Japanese War on the cruiser Takachiho at the Battle of the Yalu River. He was subsequently served on the Amagi before transferred to the Navy General Staff Records Department, and assigned to compile an official record of naval operations during the war (which was published in 1903). Ogasawara continued to serve on the General Staff as a naval intelligence officer through the Russo-Japanese War and World War I, rising to the rank of vice admiral by 1918, aside from a one-year tour of sea duty as executive officer of the Chiyoda in 1903, and as captain of the cruiser Tokiwa and battleship Katori in 1912. He was an expert on codes and ciphers, but by the time he had reached flag rank, he was best known as public relations expert for the navy, with his colorful writings on naval history earning him the nickname of the "literary admiral".


b