In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

[Q]: Sentence: A bow wake is created when the wave source moves faster than the wave propagation speed. Question: What is created when the wave source moves faster than the wave propagation speed?
[A]: bow wake

[Q]: Sentence: Protons and neutrons are made of quarks, which are fundamental particles of matter. Question: A fundamental particle of matter, protons and neutrons are made of these?
[A]: quarks

[Q]: Sentence: Learned behavior type of behavior is most flexible. Question: What type of behavior is most flexible?
[A]:
learned behavior