[{'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:child_data = pd.read_csv('../input/santa-gift-matching/child_wishlist_v2.csv', \n                         header=None).drop(0, 1).values\ngift_data = pd.read_csv('../input/santa-gift-matching/gift_goodkids_v2.csv', \n                        header=None).drop(0, 1).values\n\nn_children = 1000000\nn_gift_type = 1000 \nn_gift_quantity = 1000\nn_child_wish = 100\ntriplets = 5001\ntwins = 40000\ntts = triplets + twins "}, {'role': 'assistant', 'content': 'helper_functions'}]