205716
The airfield was built as a temporary wartime field by Army Engineers , using Pierced Steel Planking ( PSP ) for runways and parking and dispersal areas , and support structures being quickly constructed out of wood or tents .
 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