[{'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:columns = len(nominal_list)/2+1\n\nfig = plt.figure(figsize=(20, 10))\nplt.subplots_adjust(hspace=0.6, wspace=0.4)\n\nfor i in range(len(nominal_list)):\n    ax = fig.add_subplot(columns, 2, i+1)\n\n    #     \n    sns.boxplot(x=nominal_list[i], y=train.revenue, data=train, ax=ax)\n    plt.xticks(rotation=45)\n    # \n#     sns.barplot(x = nominal_list[i], y = train.revenue, data=train, ax=ax)\nplt.show()\n'"}, {'role': 'assistant', 'content': 'result_visualization'}]