What's the building sitting on?
The building is sitting on the rocks.
     src           edge_attr  dst
0      0      to the left of   18
1      0      to the left of   10
2      1                  on   22
3      1      to the left of    7
4      1      to the left of   28
..   ...                 ...  ...
117   31  standing on top of    7
118   31      to the left of    7
119   31      to the left of    1
120   31     to the right of   11
121   31      to the left of   28

[122 rows x 3 columns]