<｜begin▁of▁sentence｜>### Instruction:
Given a directed graph where nodes 0, 1, 2, 3, and 4 form a simple path (0 -> 1 -> 2 -> 3 -> 4), determine if the set {1} is a minimal d-separator for nodes 0 and 4.
### Response:
import networkx as nx

# Create a directed graph
G = nx.DiGraph()
G.add_edges_from([(0,1), (1,2), (2,3), (3,4)])

# Check if the set {1} is a minimal d-separator for nodes 0 and 4
is_minimal = nx.is_minimal_d_separator(G, 0, 4, {1})
print(is_minimal)

# Output: True
# Explanation: In this graph, node 1 d-separates node 0 from node 4 and removing any node from the set {1} would not d-separate them.
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