You will be given a definition of a task first, then some input of the task.
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: How old was Hitler the year Geyr commanded the 3rd Panzer Division during the invasion of Poland? Passage:From 1 September 7 October 1939 Geyr commanded the 3rd Panzer Division during the invasion of Poland, where it was the most numerically powerful Panzer Division, with 391 tanks. For a victory at Kulm, he was praised by Hitler on the battlefield who had visited the division in recognition for its achievements in Poland. He was promoted to General der Kavallerie of the XXIV Panzer Corps on 15 February 1940. In 1940 he commanded the XXIV Panzer Corps in the Invasion of France. In 1941, in the invasion of the Soviet Union, Geyr's XXIV Panzer Corps was part of General Heinz Guderian's Second Panzer Army, and consisted of all of Guderian's major tank units. On 9 July 1941, he was awarded the Knight's Cross of the Iron Cross as General der Panzertruppe. By early November 1941, Geyr's Panzer Corps commanded the 3rd, 4th, and 17th Panzer Divisions, the panzer regiment from the 18th Panzer Division, as well as the Infantry Regiment Grodeutschland, and spearheaded the advance of Army Group Centre during the Battle of Moscow.

Output:
From 1 September 7 October 1939 Geyr commanded the 3rd Panzer Division during the invasion of Poland, where it was the most numerically powerful Panzer Division, with 391 tanks