What instrument is it?
The instrument is a piano.
    src        edge_attr  dst
0     0  to the right of   11
1     0  to the right of    2
2     0  to the right of    9
3     2   to the left of   10
4     2  to the right of   11
5     2  to the right of    7
6     2   to the left of    0
7     3   to the left of    9
8     4               in    6
9     4   to the left of    5
10    4   to the left of    9
11    5   to the left of    9
12    5               in    6
13    5  to the right of    4
14    6   to the left of    9
15    7   to the left of    2
16    7   to the left of    8
17    7   to the left of   11
18    8  to the right of    7
19    9   to the left of    0
20    9  to the right of    6
21    9  to the right of    4
22    9  to the right of    3
23    9  to the right of    5
24   10  to the right of    2
25   11   to the left of    0
26   11  to the right of    7
27   11   to the left of    2