What device is black?
The device is a tablet.
    src        edge_attr  dst
0     0   to the left of   15
1     0   to the left of   17
2     1   to the left of   17
3     1   to the left of   15
4     2  to the right of   19
..  ...              ...  ...
92   22   to the left of   18
93   22   to the left of   11
94   22  to the right of    5
95   22  to the right of    7
96   22   to the left of   20

[97 rows x 3 columns]