code: public final List<SequenceLabel> getSequences(final String[] tokens) {
      final Span[] origSpans = this.sequenceLabeler.tag(tokens);
      final Span[] seqSpans = SequenceLabelerME.dropOverlappingSpans(origSpans);
      return getSequencesFromSpans(tokens,
          seqSpans);
    }
docs: Produce a list of the {@link SequenceLabel} objects classified by the
  probabilistic model.
  
  Takes an array of tokens, calls seqToSpans function for probabilistic
  Sequence Labeling and returns a List of {@link SequenceLabel} objects
  containing the string, the type and the {@link Span}.
  
  @param tokens
  an array of tokenized text
  @return a List of sequences