Task: Text Categorization
Input (English): Context: Hadrosteidae is a family of arthrodire placoderms from the Late Devonian. It was originally erected for the late Frasnian Hadrosteus from the Kellwasserkalk facies. Later the family was subjectively subsumed into Dinichthyidae due to Hadrosteus' anatomical similarities with Dunkleosteus and Dinichthys.
Question: The document can be classified to which topic? 
Options: 1)Animal, 2)OfficeHolder, 3)Album, 4)NaturalPlace, 5)Plant
Output (English): 1