分类文本数据集中的情感，例如在评论中识别正面和负面反馈。
示例输入：This product is amazing! I love it so much.
示例输入：I am very disappointed with this purchase. It was a waste of money.
示例输入：The service at this restaurant was terrible. I will never come back.
示例输出 1：正面
示例输出 2：负面
示例输出 3：负面