Are there either tissues or clocks?
Yes, there is a clock.
    src        edge_attr  dst
0     1   to the left of   11
1     1  to the right of   10
2     1   to the left of   12
3     1        on top of   15
4     1  to the right of    6
..  ...              ...  ...
59   18   to the left of    5
60   18  to the right of    4
61   19  to the right of   11
62   19  to the right of    1
63   19  to the right of   12

[64 rows x 3 columns]