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The other widely used primitive for obtaining long-period pseudorandom sequences is the linear feedback shift register construction , which is based on arithmetic in GF ( 2 ) [ " x " ] , the polynomial ring over GF ( 2 ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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