Handle the case that the LHS of the overlap operator is a token itself.
Handle the case that the LHS of the overlap operator is a token itself.

thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS