6288
Some sense of the noise and power of a cavalry charge can be gained from the 1970 film " Waterloo " , which featured some 2,000 cavalrymen , some of them Cossacks .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None