Definition: 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.
Input: Question: When did rail line that the Albany-Sumner Avenues station was located close? Passage:AlbanySumner Avenues was a station on the demolished BMT Fulton Street Line. It had 2 tracks and 2 side platforms. It was served by trains of the BMT Fulton Street Line. The station was opened on May 30, 1888, and had connections to the Sumner Avenue Line streetcars. Eastbound trains stopped at Albany Avenue, while westbound trains stopped at Sumner Avenue (now Marcus Garvey Boulevard). The next stop to the east was Troy Avenue. The next stop to the west was Tompkins Avenue. During 1912 and 1924, the Dual Contracts program installed a third track on the Fulton El between Nostrand Avenue and the new Hinsdale Street station. Albany-Sumner Avenues stations were closed during that time. In 1936 the Independent Subway System built an underground Fulton Street Subway station at KingstonThroop Avenues between here and the nearby BrooklynTompkins Avenues Station. The el station became obsolete.

Output:
b