368164
Two of the aircraft , one piloted by Piotr Banachowicz and the other by the group 's founder , Lech Marchelewski , struck each other at right angles , destroying both aircraft and killing both pilots .
 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