Is the color of the letter the same as the sign?
No, the sign is yellow and the letter is black.
    src        edge_attr  dst
0     0  to the right of    1
1     1   to the left of    0
2     2          next to    8
3     2             near    8
4     3               on    2
5     3  to the right of    5
6     4  to the right of    6
7     5               on    2
8     5   to the left of    3
9     6   to the left of    4
10    8             near    2