Are there any chairs to the left of the mouse?
No, there is a keyboard to the left of the mouse.
    src        edge_attr  dst
0     0   to the left of    5
1     3   to the left of    4
2     4  to the right of    3
3     4       sitting on    5
4     4  to the right of    5
5     5  to the right of    0
6     5   to the left of    4
7     6  to the right of    7
8     6  to the right of    8
9     7   to the left of    6
10    7   to the left of   10
11    8   to the left of    6
12    8   to the left of   10
13   10               on    3
14   10  to the right of    8
15   10  to the right of    7