docstr: Get the score of the best in the beam.
code: def get_best(self):
      "Get the score of the best in the beam."
      scores, ids = self.sortBest()
      return scores[1], ids[1]
  
file_path: stanza/stanza/models/common/beam.py
imports: from __future__ import division
  import torch
  import stanza.models.common.seq2seq_constant
label_desc: Use image node_id 6 for calling the Beam obj's underlying member method code with example usage: obj.get_best() and returns: scores,  ids