Task: Text Categorization
Input (English): Context: RVNS Tran Quoc Toan(HQ-03) was a South Vietnamese frigate of the Republic of Vietnam Navy in commission from 1971 to 1975. She and her six sister ships were the largest South Vietnamese naval ships of their time.
Question: The document can be classified to which topic? 
Options: 1)OfficeHolder, 2)MeanOfTransportation, 3)Building, 4)Animal
Output (English): 2