<｜begin▁of▁sentence｜>### Instruction:
Given a social network graph represented as a karate club graph in NetworkX, can you compute the group closeness centrality for a set of members represented by node IDs [1, 2, 3]?
### Response:
import networkx as nx

# Create a graph
G = nx.karate_club_graph()

# Define a group of nodes
S = [1, 2, 3]

# Compute the group closeness centrality
group_closeness = nx.group_closeness_centrality(G, S)

print('Group closeness centrality:', group_closeness)
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