<｜begin▁of▁sentence｜>### Instruction:
Given a graph which you can read from network.gml, can you use the `Clustering.Clustering.size` function in igraph to find the size of a cluster with a specific index?
### Response:
import igraph as ig

# Load the graph
graph = ig.read('network.gml')

# Perform community detection
clustering = graph.community_edge_betweenness()
clusters = clustering.as_clustering()

# Get the size of cluster with index
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