2644
Washington says it wants to use dialogue to resolve the nuclear crisis , although U . S . officials have not ruled out a military option .
 Washington, it, U . S, military, U . S . officials, nuclear
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 Washington, it, U . S, military, U . S . officials, nuclear