<｜begin▁of▁sentence｜>### Instruction:
Given a graph whose edge set is [(1, 2), (1, 3), (2, 3), (3, 4), (4, 5)], how would you calculate the group betweenness centrality for a group of nodes [2, 3], treating all edges with equal weight and excluding path endpoints in the centrality calculation?
### Response:
import networkx as nx

# Creating a graph with undirected edges
G = nx.Graph([(1, 2), (1, 3), (2, 3), (3, 4), (4, 5)])

# Define a group of nodes for which we want to find group betweenness centrality
C = [2, 3]

# Calculate group betweenness centrality
betweenness = nx.group_betweenness_centrality(G, C, normalized=True, weight=None, endpoints=False)

print("Group betweenness centrality for nodes in group", C, ":", betweenness)
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