Assertion: horseshoe crab | /r/HasProperty | relatives of the eurypterids
Facets:
Source sentences:
text: Horseshoe crabs are relatives of the Eurypterids (sea scorpions), whose first fossils appeared at the same time.
text: Horseshoe crabs are relatives of the Eurypterids (sea scorpions), whose first fossils appeared at the same time.