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.

Example Input: Question: Hot magma beneath the surface mixes with water and forms what? Answer: gas
Example Output: Hot magma beneath the surface mixes with water and forms gas.

Example Input: Question: Plant cells have structures that animal cells? Answer: lack
Example Output: Plant cells have structures that animal cells lack.

Example Input: Question: What is categorized by the forces holding the individual atoms, ions, or molecules together? Answer: solids
Example Output:
Solids are categorized by the forces holding the individual atoms, ions, or molecules together.