<｜begin▁of▁sentence｜>### Instruction:
Given the Network Science coauthorship graph which you can read from a gml file named netscience.gml, can you use the core_expansion function in cdlib to perform community detection? And can you convert the resulting community structure to a JSON object? Notes: You need to print the JSON representation of the communities.
### Response:
import networkx as nx
from cdlib import algorithms
# Read the network science coauthorships graph
G = nx.read_gml('netscience.gml')
# Perform community detection using Core Expansion algorithm
communities = algorithms.core_expansion(G)
# Convert the community structure to JSON
communities_json = communities.to_json()
print(communities_json)
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