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. 

Input: Consider Input: An owl leaves his nest. The owl flys out into the night. The owl looks down at the ground. The owls keen eyesight allows him to see in the dark. The owls sensitive hearing allows him to locate hidden prey. The owl swoops down. The owl catches a mouse in his talons. 

Output: owl ,mouse 


Input: Consider Input: Begin the party. Partake in activities. Bring out the cake. Sing "Happy Birthday!". Blow out the candles. Eat the cake. Open the presents. 

Output: cake ,candles 


Input: Consider Input: Magma rises to the surface during a volcano. The magma undergoes changes in temperature. The magma undergoes changes in pressure. The magma cools. The magma solidifies. The magma crystallizes. Igneous rock is formed. 


Output: magma ,igneous rock