<｜begin▁of▁sentence｜>### Instruction:
Given a networkx erdos_renyi_graph with params n=500, p=0.1, can you use CommunityStructureExpansionSampler to sample a subgraph with a start node at 0 and compute the average shortest path length of the sampled graph?
### Response:
import networkx as nx
from littleballoffur import CommunityStructureExpansionSampler

G = nx.gnp_random_graph(n=500, p=0.1)
sampler = CommunityStructureExpansionSampler()
sampler_G = sampler.sample(G, start_node=0)

result = nx.average_shortest_path_length(sampler_G)
print(result)
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