How to write a predicate to be in a list?

Question

Prolog

the essence of the question is this, there is such a graph
graph1( [ edge( 3,4 ), edge( 4,5 ) ] ).
and it turns out you need to write predicate
neighbor( G, N1, N2 ) which checks if there is edge( N1, N2 ) in G( graph 1 is the same for example) and returns n1,n2,G if it's true
Here are my attempts how I tried to do it tell me what's wrong or tell me in which direction to dig