<｜begin▁of▁sentence｜>### Instruction:
Given a graph which you can read from 'graph_data.ncol', can you use the community_multilevel function to find the community structure using the multilevel algorithm?
### Response:
import igraph as ig

# Load graph from a file or define it directly
g = ig.Graph.Read_Ncol('graph_data.ncol')  # Assuming 'graph_data.ncol' is a file with graph data

# Finding community structure using the multilevel algorithm
communities = g.community_multilevel(return_levels=False)

# Print the community membership of each vertex
print(communities)
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