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: The distinctive appearance of what tissue is due to polysaccharides called chondroitin sulfates? Answer: cartilage

Ex Output:
The distinctive appearance of cartilage tissue is due to polysaccharides called chondroitin sulfates.


Ex Input:
Question: Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of what exist? Answer: equilibrium

Ex Output:
Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of equilibrium exist.


Ex Input:
Question: Where are aerofoils found? Answer: birds and airplanes

Ex Output:

Birds and airplanes are aerofoils found.