What is on the sign?
The words are on the sign.
     src        edge_attr  dst
0      0  to the right of   16
1      0               on   23
2      0   to the left of   14
3      1   to the left of   14
4      1  to the right of   17
..   ...              ...  ...
116   28  to the right of   11
117   29  to the right of    8
118   29  to the right of   17
119   29  to the right of   19
120   29   to the left of   14

[121 rows x 3 columns]