Assertion: parsnip's sap | /r/MadeOf | a chemical compound
Facets:
Source sentences:
text: Because each of these plants produces a sap containing a chemical compound (called furanocoumarin) that sensitizes human skin to sunlight.
text: The sap contains chemical compounds which causes a reaction called phytophotodermatitis when the sap is absorbed into the skin.
text: The sap within the leaves and stems of parsnip contain a chemical compound which when combined with sunlight causes dermal burning similar to sunburn.