anchor.diff:  "NUTS_CH061","Luzern","Switzerland","NUTS3"
   "NUTS_FRD13","Orne","France","NUTS3"
   "NUTS_FRB04","Indre-et-Loire","France","NUTS3"
  -"NUTS_CZ051","Liberecký kraj","Czechia","NUTS3"
  +"NUTS_CZ051","Liberecký kraj","Czech Republic","NUTS3"
   "NUTS_FRY10","Guadeloupe","France","NUTS3"
   "NUTS_DK022","Vest- og Sydsjælland","Denmark","NUTS3"
   "NUTS_FRJ26","Hautes-Pyrénées","France","NUTS3"
  
positive.code: "NUTS_PT16E","Região de Coimbra","Portugal","NUTS3"
  "NUTS_BE351","Arr. Dinant","Belgium","NUTS3"
  "NUTS_CH025","Jura","Switzerland","NUTS3"
  "NUTS_CZ063","Kraj Vysocina","Czechia","NUTS3"
  "NUTS_FRK21","Ain","France","NUTS3"
  "NUTS_FI1D5","Keski-Pohjanmaa","Finland","NUTS3"
  "NUTS_CH063","Schwyz","Switzerland","NUTS3"
  
negative.code: "NUTS_SK032","Banskobystrický kraj","Slovakia","NUTS3"
  "NUTS_BG321","Veliko Tarnovo","Bulgaria","NUTS3"
  "NUTS_BG425","Kardzhali","Bulgaria","NUTS3"
  "NUTS_CZ032","Plzenský kraj","Czech Republic","NUTS3"
  "NUTS_SK023","Nitriansky kraj","Slovakia","NUTS3"
  "NUTS_BG314","Pleven","Bulgaria","NUTS3"
  "NUTS_FRK13","Haute-Loire","France","NUTS3"
  "NUTS_LT028","Telsiu apskritis","Lithuania","NUTS3"
  "NUTS_BG412","Sofia","Bulgaria","NUTS3"
  "NUTS_BG323","Ruse","Bulgaria","NUTS3"
  "NUTS_CZ053","Pardubický kraj","Czech Republic","NUTS3"
  "NUTS_SE331","Västerbottens län","Sweden","NUTS3"
  "NUTS_BG341","Burgas","Bulgaria","NUTS3"
  "NUTS_FRI31","Charente","France","NUTS3"
  