<｜begin▁of▁sentence｜>### Instruction:
Given the Condensed Matter Collaborations Graph from 2005, which can be read from a GML file named 'cond-mat-2005.gml', can you use the RBerPots algorithm provided by cdlib to detect communities within the graph? Additionally, can you convert the detected communities to a JSON format and print out the result?
### Response:
import networkx as nx
from cdlib import algorithms

# Load the Condensed Matter Collaborations Graph from 2005
G = nx.read_gml('cond-mat-2005.gml')

# Apply the RBerPots algorithm with default parameters
communities = algorithms.rber_pots(G)

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