In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: Pressure and vibration are examples of what type of stimuli? Answer: physical
Pressure and vibration are examples of physical type of stimuli.

Question: What kind of lines does a diffraction grating produce? Answer: evenly spaced lines
Evenly spaced lines kind of lines does a diffraction grating produce.

Question: What signals the secretion of gastric acid? Answer: gastrin

Gastrin signals the secretion of gastric acid.