class_docstr: Coref Sample
class_docstr_tok: ["Coref","Sample"]
docstr: get the kth sen as a word list
  
  :param int k: sen id
  :return list: kth sen, word list
docstr_tok: ["get","the","kth","sen","as","a","word","list",":","param","int","k",":","sen","id",":","return","list",":","kth","sen",",","word","list"]
code: def get_kth_sen(self, k):
      r"""get the kth sen as a word list
  
      :param int k: sen id
      :return list: kth sen, word list
  
      """
      ret_part = self.part_conll([k])
      return ret_part.x.words
  
imports: from ....common.settings import ORIGIN, TASK_MASK
  from ....common.utils.fp_utils import *
  from ....common.utils.shift_utils import *
  from .sample import Sample
  from ..field import ListField, TextField
label_desc: Use image node_id 9 for calling the CorefSample obj's underlying member method code with example usage: obj.get_kth_sen(k) and returns: ret_part