anchor.diff:  2016arXiv160906376G,kepler,astrophysics
   2016arXiv160906387L,kepler,astrophysics
   2016arXiv160906474S,kepler,astrophysics
  +2016arXiv160906595K,kepler,astrophysics
   2016arXiv160906645G,kepler,astrophysics
   2016arXiv160907487H,kepler,astrophysics
   2016arXiv160907503N,kepler,exoplanets
  
positive.code: 2016MNRAS.459.3721B,kepler,astrophysics
  2016MNRAS.459.4088O,kepler,exoplanets
  2016MNRAS.460..458D,kepler,astrophysics
  2016MNRAS.460.1811S,unrelated,
  2016MNRAS.460.1970B,kepler,astrophysics
  2016MNRAS.460.2526O,kepler,astrophysics
  
negative.code: 2016arXiv160904032M,kepler,astrophysics
  2016arXiv160904128M,kepler,exoplanets
  2016arXiv160904326K,unrelated,
  2016arXiv160905053H,kepler,exoplanets
  2016arXiv160905254H,unrelated,
  2016arXiv160905398D,kepler,astrophysics
  2016arXiv160905492H,kepler,astrophysics
  