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 Q]: The inner portion of the ring is formed during rapid spring growth. The tree's growth slows as the seasons change. The ring's outer growth is more dense. The growth of the tree pushes out the bark of the tree. The tree stops growing quickly in the winter. This seasonal "pause" in growth results in distinct rings in certain tree types.
[EX A]: bark ,inner portion of the ring

[EX Q]: A sperm meets an egg in the uterus of a woman. The sperm implants itself into the egg. The sperm and egg form a zygote on the wall of the uterus. The fetus grows and develops. The woman gives birth to a baby. The baby is raised by parents until it is able to take care of itself. The person goes out into the world and finds a job. The person meets other people and has a life. The person gets a career, and gets married. The person retires and eventually passes away.
[EX A]: sperm ,egg ,zygote ,fetus ,baby ,person ,other people

[EX Q]: Tectonic plates smash together. The edges of the plates crumple up. The ridges are mountain ranges. Magma is forced to the surface. Magma forms a volcano.
[EX A]:
magma ,tectonic plates ,volcano