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. 
--------
Question: Gather the ingredients for the cake. Mix the flour, sugar, egg, and water to make batter. Pour the mixture into a cake pan. Place the cake in the oven to cook. Take the cake out when it is cooked through. Let the cake cool. Serve the cake. 

Answer: flour ,sugar ,egg ,water ,batter ,cake 


Question: Forest fires burn forests. The animals living in the forest have fewer places to hide. Predators can now find their prey eaiser. Birds will fly away from the area. Waters warm up which hurts the fish swimming in them. 

Answer: forests ,places to hide for animals 


Question: 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. 

Answer:
oxygen-depleted blood ; blood ,oxygenated blood ; blood