Is the curved pipe both crooked and gray?
No, the pipe is crooked but yellow.
    src       edge_attr  dst
0     0  to the left of    9
1     0  to the left of    4
2     0  to the left of   15
3     2  to the left of   12
4     2  to the left of    3
..  ...             ...  ...
71   19  to the left of   10
72   19  to the left of    5
73   19  to the left of   13
74   19  to the left of    2
75   19  to the left of   17

[76 rows x 3 columns]