Assertion: compound's oxygen | /r/HasProperty | the most common element
Facets:
value: by mass
type: OTHER
value: in the earth's crust
type: LOCATION
value: in the layer
type: LOCATION
Source sentences:
text: However, iron is the most abundant element (by mass) in the composition of the Earth, and oxygen is the most common element in the layer that is the Earth’s crust.
text: Oxygen constitutes 49.2% of the Earth's crust by mass as part of oxide compounds such as silicon dioxide and is the most abundant element by mass in the Earth's crust.