Q: In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.
Context: Calpocalyx atlanticus is a species of legume in the Fabaceae family.It is found only in Cameroon.
Question: The document can be classified to which topic? 
Options: 1)WrittenWork, 2)Album, 3)NaturalPlace, 4)OfficeHolder, 5)Plant
A:
5