[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify code snippets into one of the following categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']."}, {'role': 'user', 'content': "Identify the single most appropriate category to which the provided code belongs. Provide your response as a single category label without any additional information, commentary, or personal opinions.\\nPython Code:df_cleaned = df_cleaned[np.abs(df_cleaned['review_scores_rating']-df_cleaned['review_scores_rating'].mean()) <= (3*df['review_scores_rating'].std())]\ndf_cleaned = pd.melt(df_cleaned, id_vars = ['host_identity_verified'], value_vars = ['review_scores_rating'])\ng = sns.FacetGrid(df_cleaned, col='variable', size = 10, aspect = .5)\ng = g.map(sns.boxplot, 'host_identity_verified', 'value')\nsns.plt.title('Plot 3: Impact of Host Identity Verification on Review Scores Rating')\ng.set(xlabel = '', ylabel = 'Review Scores Rating')\nplt.show()"}, {'role': 'assistant', 'content': 'data_exploration'}]