class_docstr: A speaker with its names, list of mentions and matching test functions
docstr: Does the Speaker contains a Mention
docstr_tok: ["Does","the","Speaker","contains","a","Mention"]
code: def contain_mention(self, mention):
      """Does the Speaker contains a Mention"""
      return mention in self.mentions
  
imports: import re
  import io
  from six import string_types, integer_types
  from spacy.tokens import Span, Token
  from neuralcoref.train.compat import unicode_
  from neuralcoref.train.utils import encode_distance, parallel_process
  import spacy
  import numpy
label_desc: Use image node_id 4 for calling the Speaker obj's underlying member method code with example usage: obj.contain_mention(mention) and returns: unknown