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.

Ex Input:
Question: How many total people have been awarded the fellowship that Heutz received in 2007? Passage:Heutz joined Imperial College London in 2007 as a Royal Society Dorothy Hodgkin Research Fellow. She was awarded the 2008 Institute of Materials, Minerals and Mining Silver Medal for her research on organic thin films. In particular she had developed new electron - donor morphologies for efficient solar cells. Heutz specialises in the use of electron paramagnetic resonance (EPR) to monitor unpaired electrons within materials. She used EPR to monitor spins within copper phthalocyanine solar cells. Whilst working on new materials for photovoltaics, Heutz showed that electrons in copper phthalocyanine (a blue pigment found in a Bank of England 5 note) exist in a superposition of two different spin states. She demonstrated that copper phthalocyanine could be used for quantum computing, where information is stored as qubits as opposed to binary bits.

Ex Output:
b

Ex Input:
Question: How long had Ferdinand I been in power the year Coimbra fell? Passage:The history of the county of Portugal is traditionally dated from the reconquest of Portus Cale (Porto) by Vimara Peres in 868. He was named a count and given control of the frontier region between the Limia and Douro rivers by Alfonso III of Asturias. South of the Douro, another border county would be formed decades later when what would become the County of Coimbra was conquered from the Moors by Hermenegildo Guterres. This moved the frontier away from the southern bounds of the county of Portugal, but it was still subject to repeated campaigns from the Caliphate of Cordoba. The recapture of Coimbra by Almanzor in 987 again placed the County of Portugal on the southern frontier of the Leonese state for most of the rest of the first county's existence. The regions to its south were only again conquered in the reign of Ferdinand I of Leon and Castile, with Lamego falling in 1057, Viseu in 1058 and finally Coimbra in 1064.

Ex Output:
b

Ex Input:
Question: Which song made more money the year Midnight Angel was released, Begin the Beguine or As Time Goes By? Passage:Rudy Vallee was the first artist to make the charts in Billboard magazine with "As Time Goes By" when he took the song to number 15 in 1931, but after the song was featured in the film Casablanca his recording was reissued and spent four weeks at number one in 1943. "Begin the Beguine" was first put on the charts by Xavier Cugat & His Waldorf-Astoria Orchestra with Don Reid on vocal for two weeks in 1935 when it reached number 13. Patti Austin's "We're in Love" made it to number 90 on the magazine's R&B chart in February 1978, and the Expanded Edition CD bonus track "I Never Said I Love You" was first recorded by Barbara Mandrell for her 1976 album Midnight Angel but was a number 84 pop hit for Orsa Lia that also spent a week at number one on the magazine's Easy Listening chart in 1979.

Ex Output:
a