What is common to the arrow and the building?
The color, both the arrow and the building are white.
    src        edge_attr  dst
0     2           beside    1
1     2  to the right of    6
2     3   to the left of    7
3     3   to the left of    6
4     3  to the right of   12
5     4   to the left of    6
6     4   to the left of   11
7     4   to the left of    7
8     5   to the left of    6
9     5               on    1
10    6               on    1
11    6   to the left of   14
12    6             near   10
13    6   to the left of    2
14    6  to the right of    3
15    6  to the right of    4
16    6  to the right of    5
17    6   to the left of    8
18    6   to the left of    9
19    6  to the right of   11
20    6  to the right of   12
21    7  to the right of   12
22    7  to the right of   11
23    7  to the right of    4
24    7  to the right of    3
25    7   to the left of   14
26    8               on    9
27    8  to the right of    6
28    9  to the right of    6
29   10          next to    6
30   10             near    6
31   11   to the left of    6
32   11   to the left of    7
33   11  to the right of    4
34   12     parked along    1
35   12   to the left of    3
36   12   to the left of    6
37   12   to the left of    7
38   12        parked on    1
39   14  to the right of    7
40   14  to the right of    6