TASK DEFINITION: In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.
PROBLEM: Who ordered the translation of the old testament into greek?

SOLUTION: Ptolemy II Philadelphus

PROBLEM: How many books of game of thrones will there be?

SOLUTION: seven

PROBLEM: What is the primary fuel that would be used in fusion reactors?

SOLUTION:
uranium-235