<｜begin▁of▁sentence｜>### Instruction:
Given a graph with an edge set [(1, 2), (2, 3), (2, 4), (3, 5), (4, 5)], and a set S containing nodes {2, 3, 4}, what is the node expansion of the set S using NetworkX?
### Response:
import networkx as nx

# Create a graph
G = nx.Graph()
G.add_edges_from([(1, 2), (2, 3), (2, 4), (3, 5), (4, 5)])

# Define the set S
S = {2, 3, 4}

# Calculate the node expansion of the set S
expansion = nx.node_expansion(G, S)

print('The node expansion of the set S is:', expansion)
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