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

Context : A-Lex is based on the 1962 book A Clockwork Orange by Anthony Burgess, which in 1971 was adapted into a film version by Stanley Kubrick.
Question : The A-Lex is based upon what?
A Clockwork Orange

Context : The Eighth Doctor Adventures (sometimes abbreviated as EDA or referred to as the EDAs) are a series of spin off novels based on the long running BBC science fiction television series Doctor Who and published under the BBC Books imprint.
Question : The Eighth Doctor Adventures is based upon what?
Doctor Who

Context : Mayako Kubo was born in Kobe, Japan, and studied piano at Osaka College of Music.
Question : What is the main musical instrument of Mayako Kubo?
piano