title: AQL for the smallest common ancestor for n nodes
body: <p>I am relatively new to arango graph and I am trying to find a solution for my graph problem.
  My graph looks like this:</p>
  
  <p><a href="https://i.stack.imgur.com/ldxia.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ldxia.jpg" alt="enter image description here"></a></p>
  
  <p>I have multiple start nodes and all of them SHOULD connect in an end node which is unknown to me.
  I am searching for an AQL to find these connecting end node in my graph.
  Is it possible with arango to find these node? Can anyone help me?</p>