[{'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:from sklearn.ensemble import RandomForestRegressor\n\n#  IDOpenDate\nout_columns = ["Id", "Open Date"]\ncolumns = []\n\nfor i in df_train_fin.columns:\n    if i not in out_columns:\n        columns.append(i)\n\nx_train = df_train_fin[columns]\n\n\n# \nrfr = RandomForestRegressor(\n    n_estimators=200, \n    max_depth=5, \n    max_features=0.5, \n    random_state=449,\n    n_jobs=-1\n)\nrfr.fit(x_train, y_train)\n\n\n# \nrfr.score(x_train, y_train)\''}, {'role': 'assistant', 'content': 'modelling'}]