instruction:
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:
Fluid. Waste enters the kidneys. A processing moment in the kidneys let waste and fluid pass. Prevents larger molecules to pass. Fluid goes back to the bloodstream. Bad waste is removed. The final product is turned into urine. 
answer:
fluid ,waste;larger molecules;bad waste ,urine 


question:
Warm water rises off the seas. The water condenses as it cools and gets higher in the air. Then the condensation forms into clouds. The clouds travel over areas on land. The clouds reach a saturation point. The rain falls from the clouds. 
answer:
warm water ; water ,clouds ,rain 


question:
A man and woman mate. Embryo is C. Embryo grows and develops into a fetus inside the woman's womb. The fetus is born. Begins to grow and develop through infancy and childhood. In the teenage years the human experiences puberty. Reaches sexual maturity. At 18 the human becomes an adult. Adult may procreate continuing the cycle. 
answer:

embryo ,fetus ,infancy and childhood ,adult