Assertion: salt's iodine | /r/HasProperty | rare
Facets:
value: generally
type: DEGREE
value: in the earth's crust
type: LOCATION
value: quite
type: DEGREE
Source sentences:
text: Iodine is a micronutrient and dietary mineral that is naturally present in the food supply in some regions, especially near sea coasts, but is generally quite rare in the Earth's crust, since iodine is a so-called heavy element, and abundance of chemical elements generally declines with greater atomic mass.