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:
Greenhouse gases are released into the air by human activities. The earth changes energy from the sun into heat. Heat rises from the ground. Greenhouse gas molecules in the atmosphere prevent the heat from going into space. The temperature of the earth increases. The temperature continues to rise and melts the polar ice caps. The temperature rises even faster.
answer:
greenhouse gas ,air ,earth ,energy from sun ,heat ,greenhouse gas molecules ,polar ice cap

question:
Pack up your camping gear, food, and clothes. Drive to your campsite. Set up your tent. Start a fire in the fire pit. Cook your food in the fire. Put the fire out when you are finished. Go to sleep. Wake up. Put away your tent. Drive home.
answer:
camping gear ,food ,clothes ,fire ,tent

question:
A sperm and egg meet inside a woman's fallopian tube. The fertilized egg, now a zygote, travels to the uterus. The zygote implants in the uterus. The zygote becomes an embryo. The embryo becomes a fetus. The fetus grows for approximately 9 months. The woman gives birth to a baby. The baby grows into a child. The child becomes an adult. The adult mates with another adult.
answer:
sperm ,egg ,fertilized egg; zygote ,embryo ,fetus ,baby ,child ,adult