6807
National also participates in the Northwest frequent - flier program along with four other airlines , including Delta and USAir Group Inc. 's USAir unit .
 organization: National; organization: Northwest; cardinal: four; organization: Delta; organization: USAir Group Inc. 's; organization: USAir
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:
 organization: National; organization: Northwest; cardinal: four; organization: Delta; organization: USAir Group Inc. 's; organization: USAir