Assertion: amazon river dolphin | /r/HasAspect | flexible neck
Facets:
value: extremely
type: DEGREE
value: unlike their saltwater relatives
type: OTHER
Source sentences:
text: Unlike their saltwater relatives, Amazon River Dolphins have a flexible neck and can move their head left and right due to unfused cervical vertebrae.
text: Amazon river dolphins have extremely flexible necks, as some of the vertebrae are unfused; they are able to move their head in most directions.