Task: Text Categorization
Input (English): Context: Onward Muslim Soldiers: How Jihad Still Threatens America and the West published in October 2003 is a nonfiction book by Robert Spencer. Spencer described the book as an in-depth study of the doctrine of jihad and how it is exploited today by terrorists to justify what they’re doing and to recruit and motivate new terrorists.
Question: The document can be classified to which topic? 
Options: 1)Plant, 2)Artist, 3)Building, 4)WrittenWork, 5)MeanOfTransportation
Output (English): 4