inode_id,unode_id,from_edge_id,to_edge_id,adj_from_edge_id,adj_to_edge_id
i0,u00,571500487_02,571500487_01.32,-571500487_01,571500487_01
i2,u20,571542810_01.51,571542810_02,571542811_02,571542811_01
,u_0,571542808_02,571542808_01.14,-571542808_01,571542808_01
i3,u30,571556452_01,571556452_02,571556450_02,571556450_01
i3,u31,571500475_02,571500475_01.26,-571500475_01,571500475_01
i3,u32,571540303_02,-571540303_02,571540303_02.21,571540303_01
i6,u60,571500535_02,-571500535_02,571500535_02.18,571500535_01