Task: Text Categorization
Input (English): Context: The black mussel Choromytilus meridionalis is a species of bivalve. It is a marine mollusc in the family Mytilidae.
Question: The document can be classified to which topic? 
Options: 1)Building, 2)WrittenWork, 3)Artist, 4)OfficeHolder, 5)Animal
Output (English): 5