218096
There are three main types of agitation machines : the washing machine agitator , which rotates back and forth ; the magnetic agitator , which contains a magnetic bar which rotates about a magnetic field ; manual agitation , such as with a stirring rod .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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