Assertion: selenium's amount | /r/HasProperty | needed rare
Facets:
Source sentences:
text: Only trace amounts of selenium are needed and deficiency is rare in the U.S. and Canada due to selenium occurring in foods such as grains and meats, but is more prevalent in countries with low levels of selenium in soil (see From Food).
text: Only trace amounts of selenium are needed and deficiency is rare in the U.S. and Canada due to selenium occurring in foods such as grains and meats, but is more prevalent in countries with low levels of selenium in soil (see From Food).