Assertion: eurypterid's pair | /r/HasProperty | placed before the mouth
Facets:
Source sentences:
text: The first pair of appendages, the only pair placed before the mouth, is called the chelicerae (homologous to the fangs of spiders).
text: The first pair of appendages, the only pair placed before the mouth, is called the chelicerae (homologous to the fangs of spiders).