[{'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:jeopardy = jeopardy.sort_values('Air Date')\nquestion_overlap = []\nterms_used = set()\nfor i,row in jeopardy.iterrows():\nsplit_question = row['clean_question'].split(' ')\nsplit_question = [q for q in split_question if len(q) > 5]\nmatch_count = 0\nfor word in split_question:\nif word in terms_used:\nmatch_count += 1\nterms_used.add(word)\nif len(split_question) == 0:\nquestion_overlap.append(0)\nelse:\nquestion_overlap.append(match_count/len(split_question))\njeopardy['question_overlap'] = question_overlap\njeopardy['question_overlap'].mean()"}, {'role': 'assistant', 'content': 'data_preprocessing'}]