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.

Example Input: Question: In what country did Holman accept a posting to as Secretary of Legation? Passage:In 1920, he joined the Diplomatic Service as a Third Secretary, serving in Brussels from 1921 to 1924 (promoted to Second Secretary while there, 1922). In Rome, 1924–1926, then Paris, 1926 to 1931, (becoming First Secretary in 1931). On 30 April 1930 he married the Hon. (Harriet) Anne Tyrrell, only surviving child of William George Tyrrell, Baron Tyrrell of Avon, British Ambassador to France. The wedding, at Notre Dame Cathedral, was the first 'official' wedding of a British subject at the cathedral since the marriage of Mary Queen of Scots and the Dauphin of France in 1558, and was attended by 'vast crowds'; within a year, Mrs Holman had applied to the Pope for an annulment, and Holman accepted a posting as Secretary of Legation at Peking, 1931 to 1935. At the Foreign Office, 1935–1938, then at the British Embassies in Berlin 1938–1939 and The Hague, 1939. In 1940, he married (secondly) Betty, the only daughter of Sir Gilbert Fox, 1st Baronet. Posted to Baghdad, 1940, where he became Counsellor, then to Teheran in 1942 and next the British Mission in Algiers.

Example Output: b

Example Input: Question: How many wives did Katherine's maternal grandfather have? Passage:Lady Katherine Neville was born in 1442, one of the ten children and the fifth eldest daughter of Richard Neville, 5th Earl of Salisbury and Alice Montacute, suo jure 5th Countess of Salisbury. Her mother was the only child and heiress of Thomas Montacute, 4th Earl of Salisbury by his first wife Lady Eleanor Holland. Katherine's eldest brother was Richard Neville, 16th Earl of Warwick, 6th Earl of Salisbury, also known as "Warwick the Kingmaker". He was the most important and influential peer in the realm, and one of the principal protagonists in the Wars of the Roses. Her aunt, Cecily Neville, Duchess of York, mother of future kings and Katherine's first cousins, Edward IV and Richard III, was another key figure in the dynastic civil wars that dominated most of the latter half of 15th century England. Her niece, Anne Neville (youngest daughter of the "Kingmaker") would become Queen of England as the consort of Richard III; Katherine's sister Alice, Baroness FitzHugh, and her other niece, Elizabeth FitzHugh, were personally selected as Anne's chief ladies-in-waiting. Her paternal grandparents were Ralph Neville, 1st Earl of Westmorland and Joan Beaufort, Countess of Westmoreland, a daughter of John of Gaunt by his third wife, Katherine de Roët, making her a direct descendant of Edward III. 

Example Output: b

Example Input: Question: Which river involved in shipbuilding in the North East region of England is the longest? Passage:In February 1984, Nissan and the UK government signed an agreement to build a car plant in the UK. The following month a greenfield site in Sunderland, Tyne and Wear, was chosen. As an incentive the land was offered to Nissan at agricultural prices; around £1,800 per acre. The North East region of England had recently undergone a period of industrial decline, with the closure of most of the shipyards on the Wear and Tyne, and the closure of many coal mines on the once prosperous Durham coalfield. The high unemployment this caused meant Nissan had a large, eager, manufacturing-skilled workforce to draw upon. The site, once the Sunderland Airfield (formerly RAF Usworth), was close to ports on the Wear and Tyne, within easy driving distance of the international Newcastle Airport, and close to major trunk roads such as the A1 and A19, as well as major ports for the export of vehicles. The established company became known as Nissan Motor Manufacturing (UK) Ltd, or NMUK. A ground breaking ceremony took place in July, and work began on the site in November 1984, by building contractors Sir Robert McAlpine.

Example Output:
b