I want to have nodes and edges in Entity data as below and visualize their relationships.

For example ,

?What I want to do? ----------------------------------------------------
A is connected to A1,A2,A3.

A1 and A2 are connected to C2.

A3 is connected to C6.

C2 and C6 are connected to C.

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I'm trying to visualize the above connection relationship, but it doesn't work like below. 

Is it possible to visualize ?What I want to do?field ?

Do you have any ideas?

I'd appreciate it if you could give your expertise.

Best,