4754
American investigators also say the way the bombers organized the plot in Aden has stark similarities to the way Bin Laden 's cells have operated in the past , but , they concede , while they are closer to learning the names of the bombers , they are still a long way from knowing or proving who sent them .
 national religious political: American; geographical social political: Aden; person: Bin Laden 's
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:
 national religious political: American; geographical social political: Aden; person: Bin Laden 's