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: Which commune close to Bar-sur-Aube has the largest population? Passage:Bar-sur-Aube is located some 30 km west by north-west of Chaumont and 25 km south-east of Brienne-le-Château. Access to the commune is by the D619 road from Ailleville in the north-west which passes through the centre of the commune and the town before continuing east to Lignol-le-Château. The D396 branches off the D619 south-east of the town and goes south to Juvancourt. The D4 goes south-west from the town to Couvignon. The D13 comes from Fontaine in the south and passes through the town before continuing north-east to Colombé-la-Fosse. The D384 goes north to Ville-sur-Terre while the D73 branches off it in the town and goes to Arrentières. in the north. The TER Champagne-Ardenne Troyes to Chalindrey railway passes through the commune coming from Vendeuvre-sur-Barse to the west to Bricon in the south-east with a station in the town. With a substantial urban area in the west and some forest in the south the commune is mostly farmland. 


a