Assertion: asteroid belt's asteroid | /r/HasProperty | the first
Facets:
Source sentences:
text: The largest asteroid Ceres was the first to be discovered in 1801, it has recently been re-classified as a dwarf planet.
text: Discovered in 1801, it was considered a planet for a year, and then an asteroid, the first of its kind until 2006, when it was classified as of dwarf planet being the smallest of them.