anchor.diff:  amenity college,1,1,0,rating
   amenity dentist,1,1,0,expertise equipment value_for_money
   amenity doctors,1,1,0,expertise equipment value_for_money
  -amenity drinking_water,1,1,0,rating
   amenity embassy,1,1,0,quality service value_for_money
   amenity fast_food,1,1,1,cuisine service atmosphere
   amenity ferry_terminal,1,1,0,rating
  
positive.code: amenity police,1,1,0,rating
  amenity post_office,1,1,0,quality service value_for_money
  amenity pub,1,1,1,value_for_money service atmosphere
  amenity recycling,1,1,0,rating
  amenity restaurant,1,1,1,cuisine service atmosphere
  amenity school,1,1,0,rating
  amenity shelter,1,1,0,rating
  
negative.code: amenity internet_cafe,1,1,0,quality service value_for_money
  amenity motorcycle_parking,1,1,1,rating
  amenity nursing_home,1,1,0,rating
  amenity shower,1,1,0,rating
  building,1,1,0,rating
  building train_station,1,1,0,rating
  historic archaeological_site,1,1,0,experience value_for_money
  