What is the color of the pen?
The pen is yellow.
    src        edge_attr  dst
0     0   to the left of   19
1     0   to the left of   17
2     0   to the left of    6
3     0   to the left of    2
4     0   to the left of   15
..  ...              ...  ...
75   19  to the right of    5
76   19  to the right of    0
77   19  to the right of    1
78   19   to the left of    6
79   19  to the right of   14

[80 rows x 3 columns]