test
node1
GO:0110165
cellular anatomical
entity
node2
GO:0043209
myelin sheath
node1->node2
node3
GO:0043218
compact myelin
node1->node3
node5
GO:0043220
Schmidt-Lanterman
incisure
node1->node5
node2->node3
node3->node5
node4
GO:0005575
cellular_component
node4->node1