s o via dist dist_to_via dist_from_via
urn:a urn:k urn:g
2
1
1
urn:a urn:l urn:g
2
1
1
urn:a urn:h urn:g
2
1
1
urn:a urn:i urn:g
2
1
1
urn:a urn:j urn:g
2
1
1