171528
To ease the problems of both the Dutch Army Aviation Group ( LVA ) and the MLD , in August 1917 the Ministry of War encouraged companies like the car makers Spyker to become involved in aircraft production .
 Dutch Army Aviation Group ( LVA ), Spyker
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dutch Army Aviation Group ( LVA ), Spyker