6081
Nordström 's theories of gravitation The first attempts to present a relativistic ( classical ) field theory of gravitation were also scalar theories .
 person: Nordström
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: Nordström 
Answer:
 person: Nordström