Which kind of instrument is the man playing?
The man is playing the guitar.
    src        edge_attr  dst
0     0   to the left of   15
1     0          playing    9
2     0          holding    9
3     1  to the right of   20
4     2  to the right of    8
5     2   to the left of    3
6     2   to the left of   21
7     3  to the right of    2
8     5   to the left of   15
9     8   to the left of    2
10    8   to the left of   21
11    8  to the right of   12
12   10   to the left of   11
13   11  to the right of   10
14   12   to the left of    8
15   13  to the right of   14
16   14   to the left of   13
17   15  to the right of    0
18   15  to the right of    5
19   20   to the left of    1
20   21  to the right of    8
21   21  to the right of    2
22   22               on   18