instruction:
In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.
question:
Question: How old was General Sir William Robertson when he selected Hugh Elles to liasise with troops? Passage:In August 1915, after recovering from his injuries, Elles was one of three officers specially selected by General Sir William Robertson, soon to be Chief of the Imperial General Staff (CIGS), the professional head of the British Army, to liaise with troops at the front and pass the information directly to the British General Headquarters (GHQ). In January 1916, as a General Staff Officer (GSO), Elles was sent by General Sir Douglas Haig, the Commander-in-Chief (C-in-C) of the BEF on the Western Front, to investigate the first tanks or "caterpillars" being built in England. He attended the first trials of "Mother" and reported back to Haig on its success. During the summer of 1916, he was tasked to report back from the Somme, where the tanks were first used. Elles was appointed to head the Heavy Branch (the first tank units) of the Machine Gun Corps in France on 29 September 1916, with the temporary rank of colonel. His responsibilities included its advanced training and tactical employment. He also commanded the large central depot and workshops established near Bermicourt.

answer:
In August 1915, after recovering from his injuries, Elles was one of three officers specially selected by General Sir William Robertson, soon to be Chief of the Imperial General Staff (CIGS), the professional head of the British Army, to liaise with troops at the front and pass the information directly to the British General Headquarters (GHQ)

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Question: When was the city the yeshiva fled from founded? Passage:When the Bolsheviks revolted, the yeshiva was forced to flee from Lithuania to Kletsk, Poland. During his three years in Kletsk, Yechiel Michel attended the famed Talmudic lectures of Rabbi Meltzer and his son-in-law, Rabbi Aharon Kotler. Then he transferred to the Mir yeshiva, where he became a leading student of Rabbi Yeruchom Lebovitz and learned together with Rabbi Yechiel Michel Schlesinger, future rosh yeshiva of Yeshivas Kol Torah in Jerusalem, and Rabbi Yonah Karpilow of Minsk, who was killed in the Holocaust and whose Yonas Eilem was published posthumously. At this time, Rabbi Chaim Shmuelevitz and Rabbi Aryeh Leib Malin also studied in the Mir yeshiva. Despite being surrounding by such luminaries in Torah, R' Yechiel Michel was nonetheless thought of as "the genius of the yeshiva".

answer:
When the Bolsheviks revolted, the yeshiva was forced to flee from Lithuania to Kletsk, Poland

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Question: When was the person who Stevens worked under in 1929 born? Passage:Stevens grew up in Sydney and was an accountant and public servant before entering politics. He was elected to the New South Wales Legislative Assembly at the 1927 state election, as a member of the Nationalist Party. In 1929, he was appointed state treasurer under Thomas Bavin, serving until his party lost the 1930 election. In 1932, Stevens was elected as the inaugural leader of the state branch of the UAP. He became premier later that year, following the dismissal of Labor's Jack Lang, and subsequently led his party to victory at the 1932, 1935, and 1938 elections. Stevens was ousted in 1939 and replaced by Alexander Mair. He made an abortive attempt to enter federal politics at the 1940 election, and thereafter played little part in public life.

answer:
In 1929, he was appointed state treasurer under Thomas Bavin, serving until his party lost the 1930 election