Are there either any black desks or chairs?
Yes, there is a black chair.
    src        edge_attr  dst
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1     0               by    2
2     0  to the right of    6
3     0  to the right of    3
4     0  to the right of    7
5     1   to the left of    3
6     1   to the left of    7
7     1   to the left of    6
8     2            below    4
9     2             near    3
10    3   to the left of    7
11    3             near    2
12    3  to the right of    1
13    3   to the left of    0
14    3               by    2
15    6   to the left of    0
16    6   to the left of    7
17    6  to the right of    1
18    7  to the right of    1
19    7   to the left of    0
20    7  to the right of    6
21    7  to the right of    3