 
subgraph adaptor has several known problems:
    VertexListS = vecS.EdgeListS parameter to the adjacency list is
  essentially fixed to listS: other selectors are
  unlikely to work.| Copyright © 2000-2001 | Jeremy Siek,
Indiana University (jsiek@osl.iu.edu) Lie-Quan Lee, Indiana University (llee@cs.indiana.edu) Andrew Lumsdaine, Indiana University (lums@osl.iu.edu) |