Assertion: fertilizer's trace element | /r/HasProperty | copper
Facets:
Source sentences:
text: These Trace-elements include Calcium, Magnesium, Sulphur, Manganese, Boron, Zinc and Copper.
text: Trace elements include copper, boron, copper, iron, manganese, zinc, molybdenum and chlorine.
text: Trace elements include copper, boron, copper, iron, manganese, zinc, molybdenum and chlorine.