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.

[Q]: What branch of biology creates models to make whole biological systems understandable?
[A]: computational systems biology, systems biology and mathematical biology


[Q]: Who sang these boots were made for walking first?
[A]: Nancy Sinatra


[Q]: When does dance moms season 7 episode 22 come out?
[A]:
September 19, 2017