Are the sign and the paper the same color?
Yes, both the sign and the paper are white.
     src        edge_attr  dst
0      0               on   10
1      0  to the right of   23
2      0  to the right of   11
3      1   to the left of    6
4      1   to the left of    5
..   ...              ...  ...
127   27   to the left of    8
128   27  to the right of   24
129   27   to the left of   17
130   27   to the left of   22
131   27   to the left of   25

[132 rows x 3 columns]