Assertion: biological macromolecule | /r/MadeOf | oxygen
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: They usually also contain hydrogen and oxygen, as well as nitrogen and additional minor elements.
text: They usually also contain hydrogen and oxygen, as well as nitrogen and additional minor elements.
text: In addition, they may contain hydrogen, oxygen, nitrogen, and additional minor elements.
text: In addition, they may contain hydrogen, oxygen, nitrogen, phosphorus, sulfur, and additional minor elements.