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. 

Two large veins bring blood to the heart. The blood enters the right atrium. The blood flows through the tricuspid valve. The blood travels into the right ventricle. The blood goes through the pulmonary arteries to the lungs. Blood picks up oxygen in the lungs. Oxygenated blood enters the left atrium. Blood goes to the left ventricle. Blood leaves the heart via the aorta to the rest of the body. The deoxygenated blood returns to the heart. 
oxygenated blood ,deoxygenated blood ,oxygen 

Warm water floats up from the ocean. A pocket of low pressure air is created near the surface of the ocean. Warm air from outside areas pushes into the low pressure area. The warm air keeps rising and forms clouds. The wind is getting fed moisture that evaporates from the ocean. This moisture causes the swirling air and clouds to grow bigger. As it gets bigger the wind rotates faster. 
warm water ,low pressure air ,warm air ,clouds ,wind ,moisture ,swirling air 

Magma rises through cracks in the Earth's crust. The pressure causes plates to move. Magma explodes to the surface. The lava from the eruption cools to form new crust. After several eruptions, the rock builds up and a volcano forms. 

volcano ,magma ,pressure ,lava ,crust ,rocks