<｜begin▁of▁sentence｜>### Instruction:
As a Quality Assurance Tester, you've been tasked with ensuring the reliability and functionality of a network analysis tool for power grids. Your team has developed a feature that allows users to analyze the community structure of power grid networks. To verify its effectiveness, you need to test the implementation of the DEMON algorithm, a method for detecting overlapping communities within the network.

You will use a sample power grid network stored in a GML file named "power.gml". The DEMON algorithm, integrated via the Community Discovery Library (cdlib) API, will be employed with specific parameters: a merging threshold of 0.25 and a minimum community size of 3. Your objective is to validate that the algorithm accurately identifies overlapping communities within the power grid network while meeting these predefined criteria.
### Response:
import networkx as nx
from cdlib import algorithms

# Read the power grid graph
G = nx.read_gml('power.gml')

# Apply DEMON community detection algorithm with epsilon=0.25 and minimum community size of 3
communities = algorithms.demon(G, epsilon=0.25, min_com_size=3)

# Output the community detection result
print(communities)
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