18730
After early growth in the late nineties the company expanded into PR and magazine publishing , as well as developing the London Stock Exchange Media Centre .
 organization: London Stock Exchange
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: London Stock Exchange 
Answer:
 organization: London Stock Exchange