@Q:
LET edgeKeys = (FOR v, e IN <span class="hljs-number">1.</span><span class="hljs-number">.1</span> ANY <span class="hljs-string">'persons/eve'</span> GRAPH <span class="hljs-string">'knows_graph'</span> RETURN e._key)
LET r = (FOR key IN edgeKeys REMOVE key IN knows) 
REMOVE <span class="hljs-string">'eve'</span> IN persons

@R
[]