edges labels should prefer intersecting nodes than other edges

[alixander]

Records: Records of Activities {
  Training -> _.Person Role: is a
  Trainee -> _.Person Role: is a
  Remediator -> _.Person Role: is a
  Quality Reviewer -> _.Person Role: is a
}

Person -> Records.Training: can perform
Person -> Records.Trainee: can be a
Person -> Records.Remediator: can be a
Person -> Records.Quality Reviewer: can review