i|wkt
1|LINESTRING(10  0, 20 0)
1|LINESTRING(10  10, 20 10)
1|LINESTRING(15  5, 20 5)
1|LINESTRING(15  5, 20 5)
1|LINESTRING(10  5, 15 5)
1|LINESTRING(10  5, 15 5)