Is the clock on the tower both round and black?
No, the clock is round but white.
    src        edge_attr  dst
0     0               on   12
1     2   to the left of    5
2     2  to the right of    4
3     4   to the left of    5
4     4   to the left of    2
5     5  to the right of    2
6     5  to the right of    4
7     6               on   12
8     7   to the left of   15
9     8  to the right of   14
10    8  to the right of   11
11    9  to the right of   12
12    9               on    8
13   10   to the left of   11
14   10  to the right of   13
15   11  to the right of   10
16   11   to the left of    8
17   12   to the left of    9
18   13   to the left of   10
19   14   to the left of    8
20   15  to the right of    7
21   16   to the left of   17
22   17  to the right of   16