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 many people were living in the wards of Tokyo when it became Tokyo Metropolis? Passage:The 23 Special Wards of Tokyo were formerly Tokyo City. On July 1, 1943, it merged with Tokyo Prefecture and became Tokyo Metropolis with an additional 26 municipalities in the western part of the prefecture, and the Izu islands and Ogasawara islands south of Tokyo. As of October 1, 2015, the population of Tokyo is estimated to be over 13.4 million, or about 11% of Japan's total population. The latest estimate in 2019 shows the growing population of Tokyo with 13.9 million people, with the special wards 9.6 million, the Tama area 4.2 million, and the Islands 25,147. The prefecture is part of the world's most populous metropolitan area called the Greater Tokyo Area with over 40 million people and the world's largest urban agglomeration economy. , Tokyo hosted 51 of the Fortune Global 500 companies, the highest number of any city in the world at that time. Tokyo ranked third (twice) in the International Financial Centres Development Index. The city is home to various television networks such as Fuji TV, Tokyo MX, TV Tokyo, TV Asahi, Nippon Television, NHK and the Tokyo Broadcasting System.


a