341895
A civil engineer by training , Ammentorp took advantage of the invention of self-agitating cement trucks in the 1920s .
 person: Ammentorp
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: Ammentorp 
Answer:
 person: Ammentorp