Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Just as salty taste involves perception of sodium ions in saliva, sweet taste correlates with presence of glucose.

Answer: Just as salty taste involves perception of sodium ions in saliva, what taste correlates with presence of glucose?


Question: The values of strangeness assigned to various particles are based on decay systematics.

Answer: The values of strangeness assigned to various particles are based on what?


Question: Municipal type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards.

Answer:
What type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards?