Assertion: car seat's base | /r/HasProperty | built-in
Facets:
Source sentences:
text: Convertible car seat has a built-in base.
text: The base is easy to adjust to change the seat angle, and there is a built-in bubble level to tell you when you've got it just right.
text: CX Convertible car seat has a built-in base.
text: Zip Convertible car seat has a built-in base.
text: Convertible car seats have a built-in base.