class_docstr: Class to represent a relationship between dataframes
  
  See Also:
      :class:`.EntitySet`
class_docstr_tok: ["Class","to","represent","a","relationship","between","dataframes","See","Also",":",":","class",":","`",".EntitySet","`"]
docstr: Column in parent dataframe
docstr_tok: ["Column","in","parent","dataframe"]
code: def parent_column(self):
      """Column in parent dataframe"""
      return self.parent_dataframe.ww[self._parent_column_name]
  
label_desc: Use image node_id 8 for calling the Relationship obj's underlying member method code with example usage: obj.parent_column() and returns: self