Which color does the signal light that is on the left side of the photo have?
The signal light has red color.
     src        edge_attr  dst
0      0   to the left of   18
1      0  to the right of   16
2      0   to the left of   20
3      0  to the right of   19
4      0  to the right of    2
..   ...              ...  ...
277   35   to the left of   24
278   35   to the left of    2
279   35   to the left of   26
280   35   to the left of   27
281   36  to the right of    9

[282 rows x 3 columns]