161145
Macleod 's principal contribution to the study of economics consists in his work on the theory of credit , to which he was the first to give due prominence .
 person: Macleod
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: Macleod 
Answer:
 person: Macleod