test
node1
GO:0003674
molecular_function
node2
GO:0005488
binding
node1->node2
node6
GO:0046790
virion binding
node2->node6
node3
BFO:0000003
occurrent
node3->node3
node4
BFO:0000015
process
node3->node4
node4->node1
node5
BFO:0000001
entity
node5->node3