Is the tank top black?
Yes, the tank top is black.
     src        edge_attr  dst
0      0  to the right of   26
1      0  to the right of   22
2      0  to the right of   11
3      0  to the right of    9
4      0   to the left of    6
..   ...              ...  ...
167   29  to the right of   24
168   29  to the right of   15
169   29   to the left of   17
170   29   to the left of   26
171   29  to the right of   28

[172 rows x 3 columns]