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.

Ex Input:
Question: How many months before the buildup to Knightfall did the death of Superman occur? Passage:Within the regular series, the buildup to "Knightfall" begins with a six-issue run in Batman #484-489 (September 1992 - February 1993), in which Batman (at the onset of a personal psychological mid-life crisis) is forced to deal, in rapid succession, with the returning villain Black Mask and his gang (who target Bruce Wayne and Lucius Fox), a crazed killer called Metalhead, and a sharpshooter assassin hired by an imprisoned mobster to murder Commissioner Gordon. Batman begins to feel that he has lost his edge, especially after his failure to capture Black Mask. He finds himself unable to meditate or even focus. As Bruce Wayne, he contacts holistic therapist Shondra Kinsolving for treatment. He also assigns Robin (Tim Drake) to train Jean-Paul Valley in detective work to aid them as an ally, hoping to guide Valley's brainwashing away from making him a villainous threat. Despite the advice of everyone in his life, including Dr. Kinsolving, Bruce refuses to rest and continues to pursue his self-imposed duty despite his worsening condition (although not explicitly noted as a cause, these events take place immediately after the death of Superman, Batman's peer, elsewhere in the DC Universe).


Ex Output:
b


Ex Input:
Question: Who appeared with Alan Napier in the film that was released in 1943? Passage:He made his American stage debut as the romantic lead opposite Gladys George in Lady in Waiting. Though his film career had begun in Britain in the 1930s, he had very little success before the cameras until he joined the British expatriate community in Hollywood in 1941. There he spent time with such people as James Whale, a fellow ex-Oxford Player. He appeared in such films as Random Harvest (1942), Cat People (1942), and The Uninvited (1944). In The Song of Bernadette (1943), he played the ethically questionable psychiatrist who is hired to declare Bernadette mentally ill. He also played the vicious Earl of Warwick in Joan of Arc (1948). He performed in two Shakespearean films: the Orson Welles Macbeth (1948), in which he played a priest that Welles added to the story, who spoke lines originally uttered by other characters, and MGM's Julius Caesar (1953), as Cicero. He appeared as Mr. Rutland in the Hitchcock movie Marnie (1964).


Ex Output:
b


Ex Input:
Question: How far away is the Delaware Canal from the Lehigh Canal? Passage:Sited at the confluence of the rapidly flowing Lehigh River's waters with the more stately waters of the deeper wider Delaware, Easton became a major commercial center during the canal and railroad periods of the 19th century, when it would become a transportation hub for the eastern steel industry. The Delaware Canal, was quickly built soon after the lower Lehigh Canal (1818) became effective in regularly and reliably delivering much needed anthracite coal, into more settled lands along the rivers. And eventually the Morris would also serve to connect the rapidly developing Coal Regions to the north and west, to the fuel starved iron works to the west, the commercial port of Philadelphia to the south, and to the many home owners seeking fuel for heat within Pennsylvania, Maryland, New Jersey, Delaware and New York. Seeing other ways of exploiting the new fuel source, other entrepreneurs quickly moved to connect across the Delaware River reaching into the New York City area to the east via a connection with the Morris Canal in Phillipsburg, New Jersey, so the town became a canal nexus or hub from which the Coal from Mauch Chunk reached the world. The early railroads were often built to parallel and speed shipping along transportation corridors, and by the late 1860s the Lehigh and Susquehanna Railroad (LH&S) and Lehigh Valley Railroad (LVRR) were built to augment the bulk traffic through the canals and provide lucrative passenger travel services. The LVRR, known as 'the Black Diamond Line' would boast the twice daily "Black Diamond Express" daily passenger trains to and from New York City and Buffalo, New York via Easton. The Central Railroad of New Jersey (CNJ), would lease and operate the LH&S tracks from the 1870s until the Conrail consolidations absorbed both the Central Railroad of New Jersey and Lehigh Valley Railroad in 1966. Today, the Lehigh Valley Railroad's main line is the only major rail line that goes through Easton and is now known as the Lehigh Line; the Lehigh Line was bought by the Norfolk Southern Railway in 1999.


Ex Output:

a