<｜begin▁of▁sentence｜>### Instruction:
Given a graph read from littleballoffur7.sparse6, how can you use RandomNodeEdgeSampler to sample a subgraph with a specific number of edges while first randomly sampling nodes?
### Response:
import networkx as nx
from littleballoffur import RandomNodeEdgeSampler
G = nx.read_sparse6('littleballoffur7.sparse6')
sampler = RandomNodeEdgeSampler(number_of_edges=50)
sampler_G = sampler.sample(G)
print(sampler_G.edges(), sampler_G.nodes())
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