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 Q]: Question: Which is the oldest city that borders Garden Grove? Passage:West Grove, officially recognized as the West Grove Business District by the City of Garden Grove, and sometimes called West Garden Grove, is a neighborhood in the city of Garden Grove, located in Orange County, California, United States. West Grove encompasses the pene-exclave western portion of the city of Garden Grove. It is bordered to the north by Cypress, to the west by Los Alamitos and Seal Beach, to the south by Westminster, and to the east by Stanton, and connected to the rest of Garden Grove by a narrow strip along Garden Grove Boulevard. It includes the entire 92845 ZIP Code, which is designated as the areas west of Knott Avenue to the Seal Beach and Los Alamitos city borders, and the industrial area east of Knott Avenue to the Stanton border. The community is more "affluent" than the rest of Garden Grove, with a median income $25,000 greater than the main body of the city. There is also less crime, a lower poverty rate, and the population density is lower compared to the rest of Garden Grove. As of the 2010 Census, 16,333 people reside in West Grove.

[EX A]: a

[EX Q]: Question: How old was Littlewort when he won an Olympic gold medal? Passage:Crystal Palace started their second season in a new division, having gained promotion from the Southern League Division Two the previous season. There were a number of personnel changes this season, with Archie Grant and captain Ted Birnie moving to Chelsea and George Walker going to New Brompton. Palace's hat-trick hero in their FA Cup exploits of last season, Walter Watkins, also moved on to Northampton Town. In their places Palace brought in a number of new faces. Charles Ryan joined from Nunhead, Thomas Wills from Newcastle, Bill Forster from Sheffield United and Bill Ledger from Pryhope Villa. Wilf Innerd was made captain and played in all but one of the club's League and Cup matches. The club struggled to find their feet on the new division, and failed to score in 13 of their matches, finishing the season in 19th position, one place off the bottom. This was enough to ensure safety though, as for this season there was no relegation. Palace again called on a number of amateurs from the local area and beyond, including Henry Littlewort. Littlewort, who made his only appearance for the club this season, would go on to win a gold medal with the British Football team in the 1912 Olympics.

[EX A]: b

[EX Q]: Question: When was Cohen born? Passage:When the ultimate goal of plasma processing is a purified plasma component for injection or transfusion, the plasma component must be highly pure. The first practical large-scale method of blood plasma fractionation was developed by Edwin J. Cohn during World War II. It is known as the Cohn process (or Cohn method). This process is also known as cold ethanol fractionation as it involves gradually increasing the concentration of ethanol in the solution at 5C and 3C. The Cohn Process exploits differences in properties of the various plasma proteins, specifically, the high solubility and low pI of albumin. As the ethanol concentration is increased in stages from 0% to 40% the [pH] is lowered from neutral (pH ~ 7) to about 4.8, which is near the pI of albumin. At each stage certain proteins are precipitated out of the solution and removed. The final precipitate is purified albumin. Several variations to this process exist, including an adapted method by Nitschmann and Kistler that uses fewer steps and replaces centrifugation and bulk freezing with filtration and diafiltration.

[EX A]:
b