<｜begin▁of▁sentence｜>### Instruction:
As a network analyst, you've been given the task of analyzing the relationships within the American College football network, which is stored in a GML file named football.gml. Your objective is to use the Angel community detection algorithm available in the cdlib library to identify distinct communities within the football network. The parameters for the community detection include a merging threshold of 0.25 and a minimum community size of 3. Once the communities are detected, you need to convert the results to a JSON format for further analysis.
### Response:
import networkx as nx
from cdlib import algorithms

# Load the American College football network graph
G = nx.read_gml('football.gml')

# Apply the Angel algorithm for community detection with a predefined threshold and minimum community size
communities = algorithms.angel(G, threshold=0.25, min_community_size=3)

# Convert the community detection result to JSON format
communities_json = communities.to_json()

print(communities_json)
<|EOT|>
