5196
And even though cooperation from Yemen is at a standstill , U.S. officials tell NBC News that they are making substantial progress in the investigation and are fully confident they will get enough evidence to retaliate against those responsible .
 geographical social political: Yemen; geographical social political: U.S.; organization: NBC News
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 geographical social political: Yemen; geographical social political: U.S.; organization: NBC News