On which side of the photo is the chalkboard?
The chalkboard is on the left of the image.
    src        edge_attr  dst
0     0  to the right of    6
1     1               on    6
2     1   to the left of    9
3     1   to the left of    3
4     2               on    0
5     2  to the right of    6
6     3  to the right of    6
7     3   to the left of    4
8     3  to the right of   11
9     3   to the left of   10
10    3  to the right of    1
11    4  to the right of    3
12    4  to the right of    9
13    5  to the right of    6
14    6   to the left of    0
15    6   to the left of    2
16    6   to the left of    3
17    6   to the left of    5
18    6   to the left of    7
19    6   to the left of    9
20    7  to the right of    6
21    8  to the right of   11
22    8               on    9
23    9  to the right of    6
24    9   to the left of    4
25    9  to the right of    1
26    9  to the right of   11
27   10  to the right of    3
28   11   to the left of    8
29   11   to the left of    9
30   11   to the left of    3