Please cite the following if you use the data:

  @inproceedings{nr-aaai15,
      title = {The Network Data Repository with Interactive Graph Analytics and Visualization},
      author={Ryan A. Rossi and Nesreen K. Ahmed},
      booktitle = {AAAI},
      url={http://networkrepository.com},
      year={2015}
  }


Note the 'types' or 'node_labels' file encodes the label (or type) of a node. If the file has a single column, then the k-th row in the file maps to the node with id k.