def call
      words = stems_for(remove_stopwords_in(@words))

      score_polarities_for(frequencies_for(words))

      polarities.empty? ? 5.0 : (polarities.inject(0){ |sum, polarity| sum + polarity } / polarities.length)
    end
def call
      words = stems_for(remove_stopwords_in(@words))

      score_polarities_for(frequencies_for(words))

      polarities.empty? ? 5.0 : (polarities.inject(0){ |sum, polarity| sum + polarity } / polarities.length)
    end
Main method that initiates calculating polarity