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: Where does implantation of the blastocyst take place?

SOLUTION: wall of the uterus

PROBLEM: Who is the movie phantom thread based on?

SOLUTION: Charles Wilson Brega James

PROBLEM: When did the concept of original sin begin?

SOLUTION:
2nd century