Is the color of the tower different than the pole?
Yes, the tower is yellow and the pole is black.
    src        edge_attr  dst
0     2               of    2
1     3  to the right of   18
2     3  to the right of    6
3     4  to the right of   13
4     4  to the right of    7
5     5  to the right of   14
6     6   to the left of   14
7     6   to the left of    3
8     7  to the right of   13
9     7   to the left of    4
10    9  to the right of   16
11   10   to the left of   11
12   11  to the right of   10
13   12  to the right of   16
14   13   to the left of    7
15   13   to the left of    4
16   14  to the right of   18
17   14  to the right of    6
18   14   to the left of    5
19   16   to the left of   12
20   16   to the left of    9
21   18   to the left of    3
22   18   to the left of   14