4851
He thus worked as an Assistant to the President in Rajputana and Delhi , before being posted as Political Agent at Ambala and subsequently at Ludhiana in 1839 and Lahore in 1840 .
 location: Delhi; location: Ambala; location: Ludhiana; location: Lahore
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: Delhi, Ambala, Ludhiana, Lahore 
Answer:
 location: Delhi; location: Ambala; location: Ludhiana; location: Lahore