<｜begin▁of▁sentence｜>### Instruction:
As an expert in network analysis tools and community detection, you want to use the Power grid graph, which represents the connections between nodes in a power grid system. You have a GML file named power.gml that contains the graph data. Now, you want to apply the overlapping seed set expansion community detection algorithm from the CDLib library using a predefined set of seed nodes. After detecting the communities, you need to provide a JSON representation of the identified communities.
### Response:
import networkx as nx
from cdlib import algorithms

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

# Define a set of seeds for the OSSE algorithm
seeds = [0, 1, 2]  # Assuming node labels are integers

# Apply the Overlapping Seed Set Expansion algorithm to detect communities
communities = algorithms.overlapping_seed_set_expansion(G, seeds=seeds)

# Export communities as JSON
communities_json = communities.to_json()
print(communities_json)
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