What color is the computer to the left of the other computer, silver or black?
The computer is silver.
    src        edge_attr  dst
0     0   to the left of    9
1     1   to the left of    9
2     2  to the right of    4
3     2  to the right of    3
4     3   to the left of    7
5     3   to the left of    2
6     3   to the left of   13
7     4   to the left of    2
8     4   to the left of    7
9     5  to the right of   10
10    5   to the left of   14
11    5   to the left of    8
12    7  to the right of    4
13    7  to the right of    3
14    8  to the right of    5
15    9  to the right of    1
16    9  to the right of    0
17   10   to the left of    5
18   10   to the left of   11
19   11  to the right of   10
20   12   to the left of   13
21   12               on   13
22   13  to the right of    3
23   13  to the right of   12
24   14  to the right of    5