A directed graph of the WWW.  The dataset was released by Google in
2002.  The data was downloaded from

http://snap.stanford.edu/data/web-Google.html

The file google.edge contains the edge list of the graph.  Each line
represents a directed edge of the form "u v", which denotes that a web
page with ID u has a link to a web have with ID v.  If you use this
dataset, please cite the paper:

@article{LeskovecEtAl2009,
  author  = {Jure Leskovec and Kevin J. Lang and Anirban Dasgupta and
             Michael W. Mahoney},
  title   = {Community Structure in Large Networks: Natural Cluster Sizes
             and the Absence of Large Well-Defined Clusters},
  journal = {Int. Math.},
  year    = {2009},
  volume  = {6},
  pages   = {29--123},
  doi     = {10.1080/15427951.2009.10129177},
}

Nodes:   875,713
Edges: 5,105,039
