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. 

Q: During evaporation the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam. The water vapor or steam leaves the river, lake or ocean and goes into the air. Water vapor in the air gets cold and changes back into liquid, forming clouds, which is called condensation. Precipitation occurs when so much water has condensed that the air cannot hold it anymore. Water falls back to the earth in the form of rain, hail, sleet or snow. When water ends up on land, it will either soak into the earth and become part of the "ground water" for animals or plants to drink. It may also run into the oceans, lakes, or rivers where the cycle starts again. 

A: water ,vapor; steam; water vapor ,clouds ,rain ,hail ,sleet ,snow 
****
Q: Trash is put into a household trashbag. The trashbags are thrown into a large outdoor trashcan. The trashcan is emptied by a large trash truck. The trash truck travels to the landfill. Unloads all the trash the truck has collected. 

A: trash ,trash truck ,trashbags 
****
Q: You breathe in. Diaphragm and other muscles expand to allow room for your lungs to fill. The air flows into the narrow bronchioles in the lungs. From the bronchioles to the alveoli. The oxygen enters into the bloodstream. Is switched with the carbon dioxide in the bloodstream. The carbon dioxide enters through the alveoli. Through the narrow bronchioles. Into the lungs. The carbon dioxide is exhaled out of the body. 

A:
air ,oxygen ,carbon dioxide 
****
