Given the task definition and input, reply with output. In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.

Question: Of the two Japanese cities where the USS Butternut from 28 October until her return to the Trust Territories in 1951, which was more populous? Passage:USS Butternut departed Leyte Gulf in convoy on 24 February 1947 and shaped a course for the Marianas. She arrived at Guam on 9 March and began three years of service in the Trust Territories of the Pacific Ocean Islands. Based at Apra Harbor on Guam, she carried passengers and cargo among the islands as well as laying and tending nets at various islands. The ship also performed several assignments off Iwo Jima laying mooring buoys and assisting in the recovery, repair and replacement of submarine lines. the ship departed Guam on 19 June 1950 for repairs at the Pearl Harbor Naval Shipyard. The net laying ship completed repairs and put to sea on 15 September. Steaming via Guam and Iwo Jima, she arrived in Sasebo, Japan, on 28 October. The ship conducted operations at Sasebo and Yokosuka, Japan, until 7 July 1951 when she set sail for Guam to resume her former duties in the Trust Territories.
a