[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify the code snippets into categories from the provided list of categories. List of categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']"}, {'role': 'user', 'content': 'Identify to which category the provided code belongs and assign the code snippet to at least 1 but up to 5 categories based on the probabilities, ignore if the probability of the category is negligible. Strictly provide your response as a list. Avoid providing any additional information, commentary, or personal opinions.\\nPython Code:HIV_decrease = HIV[HIV.Increase <= -2]\nHIV_decrease.set_index("Country", inplace = True)\nHIV_decrease.Increase.plot(kind = "barh", color = \'blueviolet\')\npyplot.title("HIV Prevalance in Countries in which HIV Rate has Fallen by \\n 2% or More 2001-2013")\npyplot.xlabel("Percent of population with HIV")'}, {'role': 'assistant', 'content': "['data_exploration']"}]