title: Gremlin: How to get duplicates in a graph?
body: <p>Assume I have a graph with vertices that have property <code>name</code>, what is a good way to get Ids of all vertices that have the same name. </p>
  
  <p>Extending this, if I have a graph with <code>day</code> and <code>month</code> properties, how to return IDs of these vertices that share the same values.</p>