1999
As recounted in a stipulation that summarized government documents released for the North trial , Mr. Noriega offered to assassinate the Sandinista leadership in exchange `` for a promise to help clean up Noriega 's image and a commitment to lift the { U.S. . } ban on military sales to the Panamanian Defense Forces . ''
 North, Noriega, Sandinista, Noriega, the Panamanian Defense Forces
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 North, Noriega, Sandinista, Noriega, the Panamanian Defense Forces