Assertion: hemoglobin's oxygen | /r/HasProperty | isolated by michael sendivogius
Facets:
value: before 1604
type: TEMPORAL
Source sentences:
text: Oxygen was isolated by Michael Sendivogius before 1604, but it is commonly believed that the element was discovered independently by Carl Wilhelm Scheele, in Uppsala, in 1773 or earlier, and Joseph Priestley in Wiltshire, in 1774.