test
node1
GO:0008150
biological_process
node2
GO:0009987
cellular process
node1->node2
node4
GO:0008037
cell recognition
node2->node4
node3
BFO:0000003
occurrent
node3->node3
node5
BFO:0000015
process
node3->node5
node7
GO:0009988
cell-cell recognition
node4->node7
node5->node1
node6
BFO:0000001
entity
node6->node3