Task: Text Categorization
Input (English): Context: Echinodorus trialatus is a type of plant. In Rataj's taxonomy E. trialatus is in Section Paniculati Subgenus Echinodorus.
Question: The document can be classified to which topic? 
Options: 1)Film, 2)WrittenWork, 3)Plant, 4)MeanOfTransportation, 5)NaturalPlace
Output (English): 3