2320
The analysis consisted of 1 ) fitting first - and second - order autoregressive models ( AR1 and AR2 ) and 2 ) obtaining the power spectra of the data by fast - Fourier transform .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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