anchor.diff:  "NUTS_LT022","Kauno apskritis","Lithuania","NUTS3"
   "NUTS_BG322","Gabrovo","Bulgaria","NUTS3"
   "NUTS_FI1C4","Kymenlaakso","Finland","NUTS3"
  -"NUTS_CZ072","Zlínský kraj","Czechia","NUTS3"
  +"NUTS_CZ072","Zlínský kraj","Czech Republic","NUTS3"
   "NUTS_PT300","Região Autónoma da Madeira (PT)","Portugal","NUTS3"
   "NUTS_PT16B","Oeste","Portugal","NUTS3"
   "NUTS_CH057","Thurgau","Switzerland","NUTS3"
  
positive.code: "NUTS_BG331","Varna","Bulgaria","NUTS3"
  "NUTS_BG421","Plovdiv","Bulgaria","NUTS3"
  "NUTS_FRK14","Puy-de-Dôme","France","NUTS3"
  "NUTS_CZ064","Jihomoravský kraj","Czechia","NUTS3"
  "NUTS_FI1D7","Lappi","Finland","NUTS3"
  "NUTS_LT029","Utenos apskritis","Lithuania","NUTS3"
  "NUTS_BG413","Blagoevgrad","Bulgaria","NUTS3"
  
negative.code: "NUTS_PT16E","Região de Coimbra","Portugal","NUTS3"
  "NUTS_BE351","Arr. Dinant","Belgium","NUTS3"
  "NUTS_CH025","Jura","Switzerland","NUTS3"
  "NUTS_CZ063","Kraj Vysocina","Czech Republic","NUTS3"
  "NUTS_FRK21","Ain","France","NUTS3"
  "NUTS_FI1D5","Keski-Pohjanmaa","Finland","NUTS3"
  "NUTS_CH063","Schwyz","Switzerland","NUTS3"
  