inter_no,node_id,inter_type
175,i0,parent
175,u00,child
176,i1,parent
177,i2,parent
177,u20,child
178,i3,parent
178,u30,child
178,u31,child
178,u32,child
201,i8,parent
202,i9,parent
206,i7,parent
210,i6,parent
210,u60,child
178,c30,child