<｜begin▁of▁sentence｜>### Instruction:
Given a UCINET DL file named 'network_data.dl' containing network data, how can you use the Read_DL function in igraph to read the file and create an undirected graph from it?
### Response:
import igraph as ig

# Read the UCINET DL file and create a graph
filename = 'network_data.dl'
g = ig.Graph.Read_DL(filename, directed=False)

# Print the summary of the graph
g.summary()
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