[{'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:b"def read_df(path):\\n    \\n    df = pd.read_csv(path, index_col=\'ID\', sep=\'\\\\t\', encoding=\'utf-8\')\\n\\n    # add some columns\\n\\n    # the ending offset of the pronoun and the candidates referring entities\\n    df[\'Pronoun-offset-end\'] = df[\'Pronoun-offset\'] + df[\'Pronoun\'].str.len()\\n    df[\'A-offset-end\'] = df[\'A-offset\'] + df[\'A\'].str.len()\\n    df[\'B-offset-end\'] = df[\'B-offset\'] + df[\'B\'].str.len()\\n\\n    # text length\\n\\n    df[\'Text-length\'] = df[\'Text\'].str.len()\\n    \\n    return df"'}, {'role': 'assistant', 'content': 'load_data'}]