Updated first sentence in README file

README.md

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 # Graph-structured data classification based on spectral methods and generalized likelihood-ratio testing
 
-This page documents the reference implementation used in the following work on binary classification of graph-structured data using the graph Fourier transform and generalized likelihood-ratio test (GLRT).
+This page documents the reference implementation used in the following work on binary classification of graph-structured data applied to computer-aided diagnosis in neurology.
 
 ## Blog article 
  - **Title:** Graph-structured data classification based on spectral methods and the generalized likelihood ratio test