What is the cart to the left of the person pulled by?
The cart is pulled by the bicycle.
     src        edge_attr  dst
0      0   to the left of   13
1      0   to the left of   11
2      0  to the right of   33
3      0  to the right of   23
4      0  to the right of    1
..   ...              ...  ...
335   38   to the left of   34
336   38  to the right of   33
337   38  to the right of   28
338   38   to the left of   32
339   38  to the right of   20

[340 rows x 3 columns]