02_count_context_nodes.aql

let startNodeId = FIRST(FOR c in concept
  FILTER c.lod_url == "http://eurovoc.europa.eu/5522"
  LIMIT 1
  RETURN c._id)

FOR v, e, p in 1..5 OUTBOUND startNodeId
  broader, related, prefLabel, altLabel, definition, 
  editorialNote, inScheme, topConceptOf, scopeNote
  COLLECT WITH COUNT INTO ctx_size
  RETURN ctx_size