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.

Where are sister chromatids attached to one another?
common centromere

When is the last time the seahawks won a superbowl?
February 1, 2015

When did the guy who played robbie rotten die?

21 August 2018

