309390
The design , which was the ancestor of the modern B-2 Stealth Bomber , was much lighter and thinner in design and had six engines equipped , most likely GE F404 .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None