Which color does the clock on the building have?
The clock has white color.
    src        edge_attr  dst
0     0  to the right of    1
1     0               on    2
2     0   to the left of    3
3     0  to the right of   10
4     0   to the left of   16
..  ...              ...  ...
88   18   to the left of   16
89   18  to the right of    4
90   18  to the right of   10
91   18   to the left of   14
92   18   to the left of   15

[93 rows x 3 columns]