378480
That night , U.S. Army troops began crossing the bridges linking Washington , D.C. to Virginia .
 location: D.C.
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: D.C. 
Answer:
 location: D.C.