166341
The development of the district was further aided by the construction of the Moscow - Saint Petersburg Railway , which opened in 1851 .
 location: Moscow; location: Petersburg
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: Moscow, Petersburg 
Answer:
 location: Moscow; location: Petersburg