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 painted sunday afternoon on the island of la grande jatte?

SOLUTION: Georges-Pierre Seurat

PROBLEM: In major depressive disorder what percentage of patients will suffer a recurrent episode?

SOLUTION: 90%

PROBLEM: Who plays thanos in the guardians of the galaxy?

SOLUTION:
Josh Brolin