<｜begin▁of▁sentence｜>### Instruction:
As an Air Quality Specialist, you've been tasked with monitoring and assessing air quality levels and pollutants to protect public health and the environment. To achieve this, you need to analyze a network of sensors placed across a city to study air pollution. To do this, you're considering using a RandomWalkWithRestartSampler provided by the Air Quality Analytics API to sample a subgraph of 30 nodes from the network and find a dominating set to better understand air quality patterns in the city.
### Response:
```python
import networkx as nx
from littleballoffur import RandomWalkWithRestartSampler

G = nx.gnp_random_graph(n=900, p=0.06)

sampler = RandomWalkWithRestartSampler(30)

sampler_G = sampler.sample(G)

result = nx.dominating_set(sampler_G)

print(result)
```
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