title: How to add label to edges in d3 graph
body: <p>Please see
  <a href="http://bl.ocks.org/rkirsling/5001347" rel="noreferrer">http://bl.ocks.org/rkirsling/5001347</a></p>
  
  <p>It shows some nodes and the edges between them. Can you tell what code to add in that and where so that the edges have labels. You can assume any suitable location for the labels and you can also assume any label text.
  Thank you.</p>