test
node1
BFO:0000015
process
node2
GO:0003674
molecular_function
node1->node2
node3
GO:0060089
molecular transducer
activity
node2->node3
node5
GO:0038023
signaling receptor
activity
node3->node5
node4
BFO:0000003
occurrent
node4->node1
node4->node4
node6
GO:0001565
phorbol ester
receptor activity
node5->node6
node7
BFO:0000001
entity
node7->node4