Is there any black computer or cellphone?
No, there is a computer but it is silver.
     src        edge_attr  dst
0      1               on    7
1      1   to the left of    2
2      1   to the left of    6
3      2               on    7
4      2   to the left of    6
..   ...              ...  ...
133   33  to the right of    4
134   33  to the right of    3
135   33   to the left of   31
136   33  to the right of   30
137   33  to the right of   32

[138 rows x 3 columns]