What do the bat and the number have in common?
The color, both the bat and the number are black.
    src        edge_attr  dst
0     1   to the left of   11
1     1   to the left of   12
2     2  to the right of   12
3     3  to the right of    7
4     3  to the right of   13
5     3  to the right of   12
6     4   to the left of    7
7     4   to the left of    6
8     6  to the right of    4
9     6   to the left of   12
10    7  to the right of    4
11    7   to the left of   12
12    7   to the left of   13
13    7   to the left of    3
14    7  to the right of   16
15   10          holding   12
16   11  to the right of    1
17   12   to the left of    2
18   12  to the right of    1
19   12  to the right of    6
20   12   to the left of    3
21   12   to the left of   13
22   12  to the right of    7
23   13  to the right of    7
24   13   to the left of    3
25   13   to the left of   17
26   13  to the right of   12
27   13            above   18
28   16   to the left of    7
29   17  to the right of   13
30   18            below   13