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: What can be used to determine the mass of a quantity of material? Answer: molar masses
Molar masses can be used to determine the mass of a quantity of material.

Question: If a new organism were discovered, which of the following would most likely be used to classify it into the appropriate kingdom? Answer: the structure of the organism's anatomy
If a new organism were discovered, the structure of the organism's anatomy of the following would most likely be used to classify it into the appropriate kingdom.

Question: How many valves are in the heart? Answer: four

There are four valves in the heart.