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: What is the si unit of time period?

SOLUTION: second

PROBLEM: Who was mission san juan capistrano named after?

SOLUTION: Saint John of Capistrano

PROBLEM: When did the astros make it to the world series?

SOLUTION:
2019, 2017, 2005