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.
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Question: 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 PolishSoviet War and was wounded twice.

Answer: a

Question: Question: Who did Ronald Plasterk defeat in the 2010 election? Passage:After the election of 2006 Plasterk was appointed as Minister of Education, Culture and Science in the Cabinet Balkenende IV, taking office on 22 February 2007. The Cabinet Balkenende IV fell on 20 February 2010 after tensions in the coalition over the extension of the Dutch involvement in the Task Force Urozgan of the International Security Assistance Force (ISAF) in Afghanistan and continued to serve in a demissionary capacity until the Labour Party cabinets members resigned on 23 February 2010. Plasterk was elected as a Member of the House of Representatives after the election of 2010, taking office on 17 June 2010 serving as a frontbencher and spokesperson for Finances. After the Leader of the Labour Party and Parliamentary leader of the Labour Party in the House of Representatives Job Cohen announced that he was stepping down as Leader and Parliamentary leader in the House of Representatives following increasing criticism on his leadership, Plasterk announced his candidacy to succeed him. Plasterk lost the leadership election to fellow frontbencher Diederik Samsom on 16 March 2012. After the election of 2012 Plasterk was appointed as Minister of the Interior and Kingdom Relations in the Cabinet Rutte II, taking office on 5 November 2012. Plasterk took a medical leave of absence from 29 June 2016 until 16 September 2016 during which Minister for Housing and the Central Government Sector Stef Blok served as acting Minister of the Interior and Kingdom Relations. On 10 September 2016 Plasterk announced announced his retirement from national politics and that he wouldn't stand for the election of 2017. The Cabinet Rutte II was replaced by the Cabinet Rutte III following the cabinet formation of 2017 on 26 October 2017.

Answer: a

Question: Question: Which country was the scholar-monk who opened Enichi-ji from? Passage:Enichi-ji was opened in 807 by the Hosso sect scholar-monk Tokuitsu, who had come from Nara to spread the faith in the Aizu region. He overcame the followers of the Tendai and Shingon sects to become preeminent in Aizu, and by the time of his death in 842, the temples was a complete Shichido garan with 300 monks in residence, several thousand sohei and more than 3500 sub-temples. By the late Heian period, the temple had extended its holdings into eastern Echigo province and had established close ties with the Taira clan. During the Genpei War, the temple sent troops in support of the Heike in Shinano Province against Kiso Yoshinaka. However, the temple's leading general, Jotan-bo, was killed at the 1181 Battle of Yokotagawa by Yoshinaka's forces, and the temple's forces withdrew and the temple went into decline.

Answer:
b