Is the tower black and small?
Yes, the tower is black and small.
    src        edge_attr  dst
0     0               on    1
1     0               in    1
2     0   to the left of    2
3     2  to the right of    0
4     2               on    1
5     2  to the right of   14
6     3               in   11
7     4               in   11
8     5  to the right of   10
9     5               on   12
10    6  to the right of    8
11    8  to the right of   10
12    8   to the left of    6
13    8   to the left of   12
14    9               in   11
15   10   to the left of    5
16   10   to the left of    8
17   10   to the left of   12
18   12  to the right of    8
19   12  to the right of   10
20   14   to the left of    2