test
node1
GO:0008037
cell recognition
node2
GO:0009988
cell-cell recognition
node1->node2
node4
GO:0035036
sperm-egg recognition
node2->node4
node3
GO:0022414
reproductive process
node11
GO:0009566
fertilization
node3->node11
node3->node4
node5
GO:0000003
reproduction
node12
GO:0019953
sexual reproduction
node5->node12
node5->node3
node6
BFO:0000003
occurrent
node6->node6
node8
BFO:0000015
process
node6->node8
node7
GO:0008150
biological_process
node7->node5
node9
GO:0009987
cellular process
node7->node9
node7->node3
node8->node7
node9->node1
node10
GO:0007338
single fertilization
node10->node4
node11->node10
node12->node11
node13
BFO:0000001
entity
node13->node6