docs: def get_property(self):
          """
          Returns the property of the variable
  
          Examples
          --------
          >>> reader = XMLBIF.XMLBIFReader("xmlbif_test.xml")
          >>> reader.get_property()
          {'bowel-problem': ['position = (190, 69)'],
           'dog-out': ['position = (155, 165)'],
           'family-out': ['position = (112, 69)'],
           'hear-bark': ['position = (154, 241)'],
           'light-on': ['position = (73, 165)']}
          """
          variable_property = {variable.find('NAME').text: [property.text for property in variable.findall('PROPERTY')]
                               for variable in self.network.findall('VARIABLE')}
          return variable_property