Assertion: fern's leaf | /r/HasProperty | tongue-shaped
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Source sentences:
text: Glossopteris (Ancient Greek: γλώσσα glossa, meaning "tongue", because the leaves were tongue-shaped, and pteris, Greek for fern or feathery) is the largest and best-known genus of the extinct Permian order of seed ferns known as Glossopteridales (also known as Arberiales or Ottokariales).