342544
A " locator card " purportedly containing a " signature " of the object to be detected was inserted into a plastic " card reader " about the size of a tape cassette that could be attached to the user 's belt .
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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:
 None