5240
Collyer notes that Ilkley was at the centre of the territory of the Brigantes , and states that it was one of ten strongholds of this tribe .
 Collyer, Ilkley
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Collyer, Ilkley