<｜begin▁of▁sentence｜>### Instruction:
Given the graph 'Astrophysics collaborations' which you can read from a GML file named 'astro-ph.gml', can you use the PercoMVC function in cdlib to perform community detection and then provide the resulting communities in JSON format?
### Response:
import networkx as nx
from cdlib import algorithms

# Load the Astrophysics collaborations graph
G = nx.read_gml('astro-ph.gml')

# Perform community detection using the PercoMVC approach
communities = algorithms.percomvc(G)

# Output the results as JSON
communities_json = communities.to_json()
print(communities_json)
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