Assertion: spider | /r/HasProperty | invertebrate
Facets:
Source sentences:
text: Spiders are invertebrates (which means they do not have a backbone).
text: Spiders are invertebrates that do not have a backbone.
text: Spiders are invertebrates but are not considered insects because they only have two main body parts instead of three, eight legs instead of six and no antennae.
text: Being invertebrates, spiders have an exoskeleton comprised of a cuticle made of chitin.