Assertion: solar system's planet | /r/HasProperty | known since ancient times
Facets:
value: — mercury,
type: TEMPORAL
Source sentences:
text: Five planets have been known since ancient times — Mercury, Venus, Mars, Jupiter, and Saturn.
text: The five classical planets of the Solar System, being visible to the naked eye, have been known since ancient times and have had a significant impact on mythology, religious cosmology, and ancient astronomy.