Do you see a blue train or door?
Yes, there is a blue door.
    src        edge_attr  dst
0     0             near    6
1     0  to the right of    7
2     0             near    3
3     0             near    7
4     1               on    1
5     3             near    0
6     4   to the left of    8
7     4           behind    6
8     5  to the right of    6
9     5  to the right of    7
10    6             near    0
11    6      in front of    4
12    6   to the left of    5
13    6  to the right of    7
14    7   to the left of    6
15    7             near    0
16    7   to the left of    5
17    7   to the left of    0
18    8  to the right of    4