Generate a correct and concise answer for the question based on the words in the context.

[EX Q]: Context : He proposes the Sanchi stupa was destroyed by Pushyamitra Shunga, but later restored by his successor Agnimitra. 
Question : Who is the offspring of Pushyamitra Shunga?
[EX A]: Agnimitra

[EX Q]: Context : Zoe Zaoutzaina (died May 899) was the second wife of the Byzantine emperor Leo VI the Wise. 
Question : What is Zoe Zaoutzaina's spouse's name?
[EX A]: Leo VI the Wise

[EX Q]: Context : Susan Lenox (Her Fall and Rise) is a 1931 American Pre-Code film starring Greta Garbo and Clark Gable, based on the novel by David Graham Phillips. 
Question : The Susan Lenox (Her Fall and Rise) is based upon what?
[EX A]:
David Graham Phillips