460
In the field of cryptography , the term " knapsack problem " is often used to refer specifically to the subset sum problem and is commonly known as one of Karp 's 21 NP-complete problems .
 person: Karp
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Karp 
Answer:
 person: Karp