test
node1
GO:0005575
cellular_component
node2
GO:0110165
cellular anatomical
entity
node1->node2
node4
GO:0097218
sieve plate
node2->node4
node5
GO:0030312
external
encapsulating
structure
node2->node5
node7
GO:0071944
cell periphery
node2->node7
node3
GO:0009505
plant-type cell wall
node3->node4
node6
GO:0005618
cell wall
node5->node6
node6->node3
node7->node5