cluster_1 stage1 stage1 stage2 stage2 stage1->stage2 stage3_1 stage3_1 stage2->stage3_1 stage3_2 stage3_2 stage2->stage3_2 stage5_1 stage5_1 stage3_1->stage5_1 stage5_2 stage5_2 stage3_1->stage5_2 stage4 s4 stage3_2->stage4 some text