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 year did Ostashenko's country join the first world war? Passage:Ostashenko was born on 19 June 1896 in the village of Bolshaya Lyubshchina, Yanovichskoy volost, Vitebsky Uyezd, Vitebsk Governorate to a peasant family. He graduated from four grades at a gymnasium. During World War I, he was mobilized for military service on 7 August 1915, being sent to the 4th Company of the Reserve Battalion of the Petrograd Lifeguard Regiment in Petrograd. With the battalion, he fought with the Southwestern Front between July 1916 and February 1917, then returned to Petrograd before being demobilized on 13 March 1918. In July, he volunteered for the Red Army, serving in the Vitebsky Uyezd military commissariat as a clerk and instructor organizer. From May 1919 Ostashenko served as a Red Army man and political soldier – a Communist mobilized to conduct political work in the army – in the march battalion of the Vitebsk Reserve Regiment. From July he served as an assistant platoon commander in the 84th Rifle Regiment of the 10th Rifle Division, which fought against the Northwestern Army near Petrograd as part of the 15th Army of the Western Front. He entered the Smolensk Commanders' Infantry Courses in November and upon graduation in June 1920 became a platoon commander in the Rzhev-based 2nd Reserve Regiment. This assignment proved to be brief and a month later, Ostashenko became adjutant of the 4th Landing Detachment for armored trains with the Western Front. He fought with the detachment, which provided landing parties for armored trains, in the Polish–Soviet War and was wounded twice.

Example Output: a

Example Input: Question: What is the tallest mountain in the range where Sears Point is located? Passage:Sonoma Raceway, formerly Sears Point Raceway and Infineon Raceway, is a road course and drag strip located on the landform known as Sears Point in the southern Sonoma Mountains in Sonoma, California, USA. The road course features 12 turns on a hilly course with of total elevation change. It is host to one of only two NASCAR Sprint Cup Series races each year that are run on road courses (the other being Watkins Glen International in Watkins Glen, New York), and one of six national series road course races (Xfinity Series racing at Watkins Glen, Mid-Ohio Sports Car Course and Road America; and the Camping World Truck Series at Canadian Tire Motorsport Park). It is also host to the Verizon IndyCar Series and several other auto races and motorcycle races such as the American Federation of Motorcyclists series. Sonoma Raceway continues to host amateur, or club racing events which may or may not be open to the general public. The largest such car club is the Sports Car Club of America.

Example Output: b

Example Input: Question: Who was the second choice goalkeeper? Passage:Knight joined Portsmouth F.C. as an apprentice at the age of 14 and signed a professional contract with the club in 1977. He went on to make his debut for the club a year later, keeping a clean sheet in a 2–0 Football League Third Division win against Rotherham United with Portsmouth's relegation to the fourth tier of English football already confirmed. Knight served as reserve goalkeeper to Peter Mellor for the next three seasons, making eight appearances during Pompey's 1979–80 promotion season, before establishing himself as the team's first choice goalkeeper during the 1981–82 season where he was named the fans' player of the season for the first time. Knight was a member of the team that won the Third Division championship in 1982–83 and was given a debut for the England U21 team in a 1984 UEFA European Under-21 Championship qualifier against Greece at Portsmouth's ground Fratton Park. He made one further appearance for the England U21s against Hungary, before first choice goalkeeper Gary Bailey returned from injury. England went on to win the final tournament, with Knight's Portsmouth teammate Mark Hateley named player of the tournament.

Example Output:
a