test
node1
GO:0005615
extracellular space
node2
GO:0048180
activin complex
node1->node2
node3
GO:0110165
cellular anatomical
entity
node3->node1
node4
GO:0005576
extracellular region
node3->node4
node4->node1
node5
GO:0005575
cellular_component
node5->node3
node6
GO:0032991
protein-containing
complex
node5->node6
node6->node2