code: def usage_example(phrase, format='json'):
          
          base_url = Vocabulary.__get_api_link("urbandict")
          url = base_url.format(action="define", word=phrase)
          word_examples = {}
          json_obj = Vocabulary.__return_json(url)
          if json_obj:
              examples_list = json_obj["list"]
              for i, example in enumerate(examples_list):
                  if example["thumbs_up"] > example["thumbs_down"]:
                      word_examples[i] = example["example"].replace("\r", "").replace("\n", "")
              if word_examples:
                  # reforamatting "word_examples" using "__clean_dict()"
                  # return json.dumps(Vocabulary.__clean_dict(word_examples))
                  # return Vocabulary.__clean_dict(word_examples)
                  return Response().respond(Vocabulary.__clean_dict(word_examples), format)
              else:
                  return False
          else:
              return False
docs: Takes the source phrase and queries it to the urbandictionary API
  
          :params phrase: word for which usage_example is to be found
          :param format: response structure type. Defaults to: "json"
          :returns: returns a json object as str, False if invalid phrase