Is the pen on a desk?
No, the pen is on a notepad.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of    3
2     0   to the left of    8
3     1   to the left of    7
4     1  to the right of    5
5     2               on    4
6     2   to the left of    7
7     3  to the right of    0
8     4               of    4
9     4   to the left of    7
10    4       resting on    4
11    5   to the left of    1
12    7  to the right of    0
13    7  to the right of    1
14    7  to the right of    4
15    7            using    7
16    7  to the right of    2
17    8  to the right of    0