Is the sidewalk near the water dirty or clean?
The sidewalk is dirty.
    src        edge_attr  dst
0     0            below    1
1     0             near    1
2     0             near    2
3     1               on    0
4     1             near    2
5     1           behind    2
6     1           behind    3
7     1             near    4
8     1             near    0
9     2             near    1
10    2      in front of    1
11    2             near    3
12    2             near    4
13    2             near    7
14    2             near    0
15    3             near    2
16    3      in front of    1
17    4             near    1
18    4               by    0
19    4             near    2
20    4   to the left of    6
21    6  to the right of    4
22    7             near    2