anchor.diff:  http://www.direct.gov.uk/en/EducationAndLearning/UniversityAndHigherEducation/StudentFinance/DG_200488,301,https://www.gov.uk/student-finance-for-existing-students
   http://www.direct.gov.uk/en/EducationAndLearning/UniversityAndHigherEducation/StudentFinance/Typesoffinance/DG_171557,301,https://www.gov.uk/student-finance
   http://www.direct.gov.uk/en/Motoring/Motoringtransactions/BeforeyouapplyD/DG_193810,301,https://www.gov.uk/change-photo-driving-licence
  -http://www.direct.gov.uk/en/MoneyTaxAndBenefits/BenefitsTaxCreditsAndOtherSupport/Illorinjured/DG_10018786,301,https://www.gov.uk/statutory-sick-pay-ssp
  +http://www.direct.gov.uk/en/MoneyTaxAndBenefits/BenefitsTaxCreditsAndOtherSupport/Illorinjured/DG_10018786,301,https://www.gov.uk/statutory-sick-pay
   http://www.direct.gov.uk/en/Motoring/BuyingAndSellingAVehicle/AdviceOnBuyingAndSellingAVehicle/DG_10014436,301,https://www.gov.uk/get-vehicle-information-from-dvla
   http://www.direct.gov.uk/en/MoneyTaxAndBenefits/BenefitsTaxCreditsAndOtherSupport/Disabledpeople/DG_10018702,301,https://www.gov.uk/dla-disability-living-allowance-benefit
   http://www.direct.gov.uk/en/Motoring/LearnerAndNewDrivers/PracticalTest/DG_186585,301,https://www.gov.uk/book-practical-driving-test
  
positive.code: http://www.direct.gov.uk/en/Motoring/OwningAVehicle/HowToTaxYourVehicle/DG_4022118,301,https://www.gov.uk/calculate-vehicle-tax-rates
  http://www.direct.gov.uk/en/TravelAndTransport/Passports/howlongittakesandurgentappplications/index.htm,301,https://www.gov.uk/passport-fees
  http://www.direct.gov.uk/en/Diol1/DoItOnline/Doitonlinemotoring/DG_10031642,301,https://www.gov.uk/browse/driving
  http://www.direct.gov.uk/en/Motoring/LearnerAndNewDrivers/LearningToDriveOrRide/DG_4022530,301,https://www.gov.uk/driving-theory-practical-test-fees
  http://www.direct.gov.uk/en/Diol1/DoItOnline/DG_201704,301,https://www.gov.uk/browse/working/finding-job
  http://www.direct.gov.uk/prod_consum_dg/groups/dg_digitalassets/@dg/@en/documents/digitalasset/dg_200090.html?PRO=hp&CRE=pop,301,https://www.gov.uk/jobseekers-allowance
  http://www.direct.gov.uk/en/YoungPeople/index.htm,301,https://www.gov.uk/
  
negative.code: http://www.direct.gov.uk/en/Employment/Employees/EmploymentContractsAndConditions/DG_10027905,301,https://www.gov.uk/employment-contracts-and-conditions
  http://www.direct.gov.uk/en/MoneyTaxAndBenefits/BenefitsTaxCreditsAndOtherSupport/On_a_low_income/index.htm,301,https://www.gov.uk/browse/benefits/jobseekers-allowance
  http://www.direct.gov.uk/en/Employment/RedundancyAndLeavingYourJob/Redundancy/DG_10026616,301,https://www.gov.uk/redundant-your-rights
  http://www.direct.gov.uk/en/Governmentcitizensandrights/Registeringlifeevents/Familyhistoryandresearch/DG_175464,301,https://www.gov.uk/research-family-history
  http://www.direct.gov.uk/en/MoneyTaxAndBenefits/BenefitsTaxCreditsAndOtherSupport/Employedorlookingforwork/index.htm,301,https://www.gov.uk/browse/working
  http://www.direct.gov.uk/en/EducationAndLearning/14To19/MoneyToLearn/16to19bursary/index.htm,301,https://www.gov.uk/1619-bursary-fund
  http://www.direct.gov.uk/en/EducationAndLearning/UniversityAndHigherEducation/StudentFinance/StudentsFromOtherEUCountries/index.htm,301,https://www.gov.uk/student-finance
  