d as:

|                   boy   male     girl   female
|                     o---o child     o---o child
|  male   female       \ /             \ /          child   human
|     o---o             o               o               o---o
|      \ /              |               |               |
|       @               @               @               @

Nota Bene.  Due to graphic constraints -- no, the other
kind of graphic constraints -- of the immediate medium,
I am forced to string out the logical conjuncts o