1525
The Elmwood Historic District in Buffalo , New York is located in the central portion of the city , built around apre-existing area of the Buffalo Parks and Parkways system , which was designed between 1868 and 1876by Frederick Law Olmsted and Calvert Vaux .
 None
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:  
Answer:
 None