Created by: reyoung

This issue is a part of #1392 (closed).

There are eight books in the current Paddle Book. We need to write eight reader creators for each dataset. There are:

• 新手入门
• 识别数字
  • http://scikit-learn.org/stable/datasets/ sklearn.dataset
• 图像分类
  • cifar https://www.cs.toronto.edu/~kriz/cifar-10-python.tar.gz
• 词向量
  • By @wangkuiyi
  • It seems we could use nltk.corpus.treebank to fetch the exactly dataset used in Book.
• 情感分析
  • By @wen-bo-yang
  • The IMDB dataset is not included in nltk.corpus, but the Amazon reviews is included. So could we change the dataset used in Book?
• 语义角色标注
  • By @reyoung
  • The book uses CONLL 2005 dataset. The nltk.corpus contains CONLL 2000, CONLL 2002, CONLL 2007 dataset. Could we changed the dataset into CONLL 2007?
• 机器翻译
  • nltk.corpus contains WMT dataset.
• 个性化推荐