test
node1
BFO:0000001
entity
node2
BFO:0000003
occurrent
node1->node2
node2->node2
node5
BFO:0000015
process
node2->node5
node3
GO:0003008
system process
node4
GO:0003013
circulatory system
process
node3->node4
node8
GO:0008015
blood circulation
node4->node8
node10
GO:0003015
heart process
node4->node10
node6
GO:0008150
biological_process
node5->node6
node7
GO:0032501
multicellular
organismal process
node6->node7
node7->node3
node9
GO:0060047
heart contraction
node8->node9
node10->node9