61407
Roberts sold his models to the Railways Department in 1950 and was employed by them to maintain them as working models .
 person: Roberts; organization: Railways
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: Roberts, Railways 
Answer:
 person: Roberts; organization: Railways