e given span, annotation or
        annotation set, i.e. both the given start and end offsets
        are after the start of this span and before the end of this span.

        If end is not given, then the method checks if start is an offset of the span.

        Note: this can be called with an Annotation or AnnotationSet instead of `start` and `end`
          (see gatenlp._utils.support_annotation_or_set)

        Args:
          start: start offset of the span
          end: end offset of the span

    