14749
Tactics used by some underground groups including the cryptic Berkshire Wood Elves , which distribute leaflets with instructions on home-made explosives , are now the subject of a police investigation .
 Berkshire Wood Elves
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Berkshire Wood Elves