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 H01 Natural Sciences D010811 +
   H01.091 Astronomy D001256 +
   H01.158 Biological Sciences D001690 +
   H01.181 Chemistry D002621 +
   H01.288 Electronics D004581 +
   H01.374 Geography D005843 +
   H01.419 Geology D005844 +
   H01.548 Mathematics D008433 +
   H01.671 Physics D010825 +
   H01.770 Science D012586 +
   H01.862 Time D013995 +
   H01.939 Weights and Measures D014894 +
   H01.609 Nature D019368 
   H01.321 Evolution, Chemical D019418 
   H01.331 Evolution, Planetary D019419 
   H01.603 Nanotechnology D036103