What color does the hallway made of glass have?
The hallway has blue color.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    9
2     0  to the right of   18
3     0  to the right of    1
4     0   to the left of   10
..  ...              ...  ...
74   19   to the left of    5
75   19   to the left of    9
76   19   to the left of    7
77   20   to the left of    3
78   20   to the left of   10

[79 rows x 3 columns]