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. 

Ex Input:
Rock begins as magma from a volcano. The magma cools. Crystals form and the magma become igneous rocks. The igneous rocks break down into sediment. Become sedimentary rocks. If subjected to heat and/or pressure from plate-tectonic activity the sedimentary rocks become metamorphic rock. The metamorphic rocks melt. Become magma again. 

Ex Output:
magma ,crystals ,igneous rocks ,sediment ,sedimentary rocks ,metamorphic rocks ,rock 


Ex Input:
Body temperature rises. The brain tells blood vessels to dilate. The sweat glands become active. Moisture is released from the pores. The moisture evaporates. The evaporation causes cooling. 

Ex Output:
body ,brain ,blood vessels ,sweat glands ,moisture 


Ex Input:
Human beings burn fossil fuels (oil, gas, etc.). Carbon dioxide from the burning fossil fuels enter the atmosphere. The make-up of the atmosphere changes. Some energy from the sun cannot escape back through the changed atmosphere. The earth begins to heat because of the extra trapped energy. Human beings cut down trees. Human beings do not re-plant the trees. Trees cannot help take the extra carbon dioxide from the atmosphere. The extra trapped energy starts to change the earth's short term weather. Eventually the long-term climate patterns start to change. 

Ex Output:

fossil fuels ,carbon dioxide ,trees