Is the sky clear and gray?
No, the sky is gray but cloudy.
    src        edge_attr  dst
0     1   to the left of   11
1     2   to the left of    8
2     2   to the left of    3
3     2   to the left of   14
4     3   to the left of    8
5     3  to the right of    2
6     6   to the left of   18
7     6   to the left of   13
8     8  to the right of    2
9     8  to the right of   14
10    8  to the right of    3
11    9               on    5
12    9        parked on   17
13    9        parked at   10
14   11  to the right of    1
15   11  to the right of   12
16   12   to the left of   11
17   13  to the right of    6
18   13  to the right of   15
19   14   to the left of    8
20   14  to the right of    2
21   15   to the left of   13
22   15   to the left of   18
23   18  to the right of   15
24   18  to the right of    6