test
node1
GO:0030054
cell junction
node2
GO:0045202
synapse
node1->node2
node5
GO:0098793
presynapse
node2->node5
node3
GO:0005575
cellular_component
node4
GO:0110165
cellular anatomical
entity
node3->node4
node4->node1
node4->node5
node6
GO:0097445
presynaptic active
zone dense projection
node4->node6
node7
GO:0048786
presynaptic active
zone
node4->node7
node5->node7
node7->node6