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.

Ex Input:
Question: When gas particles collide, what kinds of collisions are these considered? Answer: elastic

Ex Output:
When gas particles collide, these collisions are considered elastic.

Ex Input:
Question: Plant cells have structures that animal cells? Answer: lack

Ex Output:
Plant cells have structures that animal cells lack.

Ex Input:
Question: When amino acids bind together, they form a long chain called what, which is an essential component of protein? Answer: polypeptide

Ex Output:
When amino acids bind together, they form a long chain called a(n) polypeptide, which is an essential component of protein.