Assertion: plesiosaur's neck | /r/HasProperty | estimated at 7.1 meters
Facets:
value: in length
type: OTHER
Source sentences:
text: The neck of Elasmosaurus is estimated at 7.1 meters (23 ft) in length; thus, Elasmosaurus and its relative Albertonectes were some of the longest-necked animals ever to have lived, with the largest number of neck vertebrae of any known vertebrate animals.