306138
This was deemed a provocation by the Russians , instigated by the first secretary of the British embassy in Constantinople David Urquhart .
 location: Constantinople David Urquhart
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: Constantinople David Urquhart 
Answer:
 location: Constantinople David Urquhart