<｜begin▁of▁sentence｜>### Instruction:
Given a directed acyclic graph (DAG) whose edge set is [('A', 'B'), ('A', 'C'), ('B', 'D'), ('C', 'D'), ('E', 'B')], can you determine whether the nodes 'A' and 'D' are d-separated by the set of nodes {'B', 'C'} using NetworkX?
### Response:
import networkx as nx
from networkx.algorithms.d_separation import d_separated

# Create a DAG
G = nx.DiGraph()
G.add_edges_from([('A', 'B'), ('A', 'C'), ('B', 'D'), ('C', 'D'), ('E', 'B')])

# Define node sets
x = {'A'}
y = {'D'}
z = {'B', 'C'}

# Check if node sets x and y are d-separated by z
separated = d_separated(G, x, y, z)
print("Are 'A' and 'D' d-separated by 'B' and 'C'?", separated)
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