[{'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:matmul_fc1=tf.matmul(X, W_fc1) + b_fc1\nh_fc1 = tf.nn.relu(matmul_fc1)   #ReLU activation\nmatmul_fc2=tf.matmul(h_fc1, W_fc2) + b_fc2\nh_fc2 = tf.nn.relu(matmul_fc2)   #ReLU activation\nmatmul_fc3=tf.matmul(h_fc2, W_fc3) + b_fc3\nh_fc3 = tf.nn.relu(matmul_fc3)   #ReLU activation\nmatmul_fc4=tf.matmul(h_fc3, W_fO) + b_fO\noutput_layer = matmul_fc4  #linear activation'}, {'role': 'assistant', 'content': 'modelling'}]