Definition: 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.

Positive Example 1 -
Input: Magma rises from deep in the earth. The magma goes into volcanos. The volcanos pressure the magma upwards. The pressure causes the magma to push through the surface of the volcano. The lava cools. The lava forms new rock. New magma is pressured to the surface of the volcano. The volcano bursts through the rock the formed after the last eruption.
Output: magma ,lava ,new rock

Positive Example 2 -
Input: Water from the ocean washes onto beaches in waves. The waves contain sediment from the ocean. The water and particles in it hit rocks and sand on the beach. The wind and current sometimes push the water and particles harder. Tiny parts of the rocks on the shore come off the larger rocks. The waves pick up sand and small rocks from the beach. The waves go back out into the ocean. The waves carry the new particles with them. Rocks and the beach look a little different.
Output: waves ,rocks ,tiny parts of rocks

Negative Example 1 -
Input: Water from oceans, lakes, swamps, rivers, and plants turns into water vapor. Water vapor condenses into millions of tiny droplets that form clouds. Clouds lose these droplets through rain or snow, also caused precipitation. Precipitation is either absorbed into the ground or runs off into rivers. Water that was absorbed into the ground is taken up by plants. Plants lose water from their surfaces as vapor. The vapor goes back into the atmosphere. Water that runs off into rivers flows into ponds, lakes, or oceans. The water evaporates back into the atmosphere.
Output: water ,magma ,droplets; rocks; rain ,snow

Negative Example 2 -
Input: Different kinds of rocks melt into magma. Magma cools in the crust. Magma goes to the surface and becomes lava. Lava cools. Cooled magma and lava become igneous rock.
Output: water ,clouds ,lava ,igneous rock

Now complete the following example -
Input: Solar panels actually comprise many, smaller units called photovoltaic cells. Photovoltaic simply means they convert sunlight into electricity.). Many cells linked together make up a solar panel. Each photovoltaic cell is basically a sandwich made up of two slices of semi-conducting material, usually silicon : . Manufacturers "dope" silicon with other materials, giving each slice of the sandwich a positive or negative electrical charge. This adds extra electrons, with a negative charge, to that layer. Meanwhile, the bottom layer gets a dose of boron, which results in fewer electrons, or a positive charge. This all adds up to an electric field at the junction between the silicon layers. When a photon of sunlight knocks an electron free, the electric field will push that electron out of the silicon junction. A couple of other components of the cell turn these electrons into usable power.
Output: 


Output: sunlight ,electrictiy ,solar panel ,electric field