Generate a sentence that answers this question: "Birds eat nuts, but sometimes they eat".

Answer: birds sometimes eat insects

Generate a sentence that answers this question: "if a student asked a teacher about the size of a certain item, what could be an indicator?".

Answer: the volume of an object can be used to describe the size of that object

Generate a sentence that answers this question: "Robotics would have great difficulty in existing if these had yet to be invented.".

Answer:
a computer controls a robot