216388
He served as engineer 's yeoman in from January 8 , 1877 to October 19 , 1878 , then enlisted in the Navy October 21 , 1878 at Constantinople .
 location: Constantinople
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 
Answer:
 location: Constantinople