How big is the bridge made of wood?
The bridge is large.
    src        edge_attr  dst
0     0               in    8
1     0   to the left of    2
2     0  to the right of    1
3     0               on    8
4     1  to the right of   16
..  ...              ...  ...
73   21   to the left of    6
74   22   to the left of    6
75   22   to the left of   21
76   22      standing on   20
77   22   to the left of   17

[78 rows x 3 columns]