Assertion: new plesiosaur | /r/HasProperty | described at a rate of three or four genera
Facets:
value: during the nineteenth
type: TEMPORAL
value: most of the twentieth century
type: TEMPORAL
value: each decade
type: TEMPORAL
Source sentences:
text: Whereas during the nineteenth and most of the twentieth century, new plesiosaurs were described at a rate of three or four genera each decade, the pace suddenly picked up in the 1990s, with seventeen plesiosaurs being discovered in this period.
text: Whereas during the nineteenth and most of the twentieth century, new plesiosaurs were described at a rate of three or four genera each decade, the pace suddenly picked up in the 1990s, with seventeen plesiosaurs being discovered in this period.