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:
Waste products are deposited in the blood. Blood is carried to the kidneys through the renal arteries. The kidneys contain filters inside. The filters capture the waste products. The waste is combined with water to make urine. The urine leaves the kidney and is collected in the bladder. The cleaned blood is returned to the body. 
answer:
waste products ,blood ,water ,urine 


question:
Waters flows downwards thanks to gravity. Enters the dam at high pressure. The moving water spins the turbines in the power plant. The turbines turn the generators. The generators spin, and produce electricity. The water leaves the dam at the bottom. 
answer:
waters;water ,turbines ,generators ,electricity 


question:
Movements of tectonic plates causes the creation of volcanoes. These volcanoes erupt. Volcanic mountains are formed from the eruption. Sometimes tectonic plates crash into one another or ride over one another. These plates sometimes fold and buckle, which forms Fold Mountains. Sometimes fault blocks are raised or tilted, and they form Block Mountains. 
answer:

block mountains ,fold mountains ,tectonic plates ,volcanic mountains ,volcanoes