Assertion: spiny dogfish's spine | /r/HasProperty | one anterior
Facets:
Source sentences:
text: While these common names may apply to several species, Squalus acanthias is distinguished by having two spines (one anterior to each dorsal fin) and lacks an anal fin.
text: Spiny dogfish can be distinguished by its two spines, one anterior to each dorsal fin and the lack of an anal fin.
text: While these common names may apply to several species, Squalus acanthias is distinguished by having two spines (one anterior to each dorsal fin) and lacks an anal fin.
text: Though these common names apply to different species, Squalus acanthias is distinguished by having two spines (one anterior to each dorsal fin) and lacks an anal fin.