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: Surface tension comes from the fact that particles at the surface of a liquid do not experience interactions from all directions imbalance of forces leads to what on the surface. Question: Surface tension comes from the fact that particles at the surface of a liquid do not experience interactions from all directions which leads to what on the surface?
[A]: imbalance of forces


[Q]: Sentence: Light retains its original color under water because frequency remains the same when light is refracted. Question: Light retains its original color under water because what remains the same when light is refracted?
[A]: frequency


[Q]: Sentence: The nuclear envelope is a double-layered plasma membrane like the cell membrane, although without membrane proteins. Question: The nuclear envelope is a double-layered plasma membrane like the cell membrane, although without what?
[A]:
membrane proteins