In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
One example: Context: During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. Link Information: Operation Market Garden was a failed World War II military operation fought in the Netherlands from 17 to 25 September 1944. Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin?
Solution is here: from 17 to 25 September 1944
Explanation: The context describes the 704th's actions during Operation Market Garden, and the answer specifies when the operation happened.

Now, solve this: Context: Early confrontations between the Sasanian Empire of Shapur II with the nomadic hordes from Central Asia called the "Chionites" were described by Ammianus Marcellinus Link Information: Shapur II ( ; New Persian: , Sapur), also known as Shapur II the Great, was the tenth Sasanian king (shah) of Iran. The longest-reigning monarch in Iranian history, he reigned for his entire 70-year life from 309 to 379. Question: How many years did the ruler of the Sasanian Empire when it had confrontations with the Chionites rule the empire?
Solution:
Answer: 70-year