In this task, you are given a paragraph, and your job is to generate comma-separated entities present in the given paragraph. Generate entities from a given passage in such a way that (i) they are present in the paragraph, (ii) they are non-duplicate, (iii) they underwent a state change during the process. Avoid creating entities that (i) aren't present in the process paragraph and (ii) aren't significant. 

[EX Q]: The virus finds an animal cell. The virus attaches to the cell's surface. The cell swallows the virus. The virus' RNA is released into the cell. The cell mistakenly reads the virus' RNA instead of its own. The cell creates new viruses. The animal cell releases the new viruses. The new viruses can infect more cells. 
[EX A]: virus ,virus' rna ,new viruses 

[EX Q]: Oxygen-depleted blood enters the heart on the right atrium. The atrium contracts. Blood flows from your right atrium into your right ventricle through the open tricuspid valve. When the ventricle is full, the tricuspid valve shuts. The ventricle contracts. Blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs. The lungs oxygenate the blood. The oxygenated blood goes into the left atrium. The left atrium sends the blood throughout the body. 
[EX A]: oxygen-depleted blood ; blood ,oxygenated blood ; blood 

[EX Q]: Air is brought in through the mouth. Passes through the lungs. And into the bronchial tissue. The carbon dioxide is removed. The lungs bring the oxygen to the rest of the body. 
[EX A]:
air ,carbon dioxide ,oxygen