Assertion: melatonin | /r/AtLocation | animal
Facets:
Source sentences:
text: Melatonin , chemically N-acetyl-5-methoxytryptamine, is a substance found in animals, plants, fungi and bacteria.
text: Melatonin is ubiquitous through the living world and can be found in most animals and plants.
text: Melatonin is a natural hormone found in animals, plants, fungi, and bacteria.
text: Melatonin is a hormone found in animals, plants, and microbes.
text: Melatonin is a chemical that is found in humans, plants, animals and even microbes.