anchor.diff:  http://www.defra.gov.uk/ahvla-cy/science/bacteriology,,410
   http://www.defra.gov.uk/ahvla-cy/science/bovine-tb,,410
   http://www.defra.gov.uk/ahvla-cy/science/bovine-tb/badger-survey-england-wales,,410
  +http://www.defra.gov.uk/ahvla-cy/science/bovine-tb/badger-survey-england-wales/feed,,410
   http://www.defra.gov.uk/ahvla-cy/science/bovine-tb/bvdp,,410
   http://www.defra.gov.uk/ahvla-cy/science/bovine-tb/bvdp/vaccination-badgers-training-course,,410
   http://www.defra.gov.uk/ahvla-cy/science/collaborations,,410
  
positive.code: http://www.defra.gov.uk/acre/sub-groups/public-engagement,,410
  http://www.defra.gov.uk/ahvla,,410
  http://www.defra.gov.uk/ahvla-cy,,410
  http://www.defra.gov.uk/ahvla-cy/2013/07/01/sbv-updated-testing-results-scotland,,410
  http://www.defra.gov.uk/ahvla-cy/2013/07/11/mae-ahvla-yn-cyhoeddi-ei-chynllun-corfforaethol-a-busnes-ar-gyfer-2013-2014,,410
  http://www.defra.gov.uk/ahvla-cy/2013/07/18/review-of-agriculture-red-tape,,410
  http://www.defra.gov.uk/ahvla-cy/2013/07/19/ahvla-at-royal-welsh-show,,410
  http://www.defra.gov.uk/ahvla-cy/2013/07/29/singaporean-visit-aimed-to-increase-confidence-in-uk-beef,,410
  http://www.defra.gov.uk/ahvla-cy/2013/07/30/ahvla-announces-new-model-for-supply-of-veterinary-services,,410
  http://www.defra.gov.uk/ahvla-cy/2013/07/30/ahvla-announces-new-model-for-supply-of-veterinary-services/feed,,410
  http://www.defra.gov.uk/ahvla-cy/2013/08/12/david-heath-bovinetb,,410
  
negative.code: http://www.defra.gov.uk/ahvla-cy/disease-control/non-notifiable/bovine-besnoitiosis,,410
  http://www.defra.gov.uk/ahvla-cy/disease-control/non-notifiable/bvd,,410
  http://www.defra.gov.uk/ahvla-cy/disease-control/non-notifiable/copper-toxicity,,410
  http://www.defra.gov.uk/ahvla-cy/disease-control/non-notifiable/eaa,,410
  http://www.defra.gov.uk/ahvla-cy/disease-control/non-notifiable/ecoli,,410
  http://www.defra.gov.uk/ahvla-cy/disease-control/non-notifiable/eggshell-apex-abnormalities-in-great-britain,,410
  http://www.defra.gov.uk/ahvla-cy/disease-control/non-notifiable/escherichia-coli,,410
  