7849
Three different techniques of EA analysis were used in the study : 1 ) fast Fourier transformation ( FFT ) of EA in a broad band , 2 ) developed by us alternative method of non - harmonic expansion of the EEG curves taking into account their shape , 3 ) factor analysis of the EA spectral densities .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None