class_docstr: This measurement returns the total number of words and the number of unique words
  in the input string(s).
code: def _info(self):
      return evaluate.MeasurementInfo(
          # This is the description that will appear on the modules page.
          module_type="measurement",
          description=_DESCRIPTION,
          citation=_CITATION,
          inputs_description=_KWARGS_DESCRIPTION,
          features=datasets.Features(
              {
                  "data": datasets.Value("string"),
              }
          ),
      )
  
imports: import datasets
  from sklearn.feature_extraction.text import CountVectorizer
  import evaluate
label_desc: Use image node_id 1 for calling the WordCount obj's underlying member method code with example usage: obj._info() and returns: evaluate