<｜begin▁of▁sentence｜>### Instruction:
Given a graph with the edge set [(0, 1), (0, 2), (1, 2), (1, 3), (1, 4), (4, 5)], is this graph AT-free?
### Response:
import networkx as nx

# Create a graph
G = nx.Graph()
G.add_edges_from([(0,1), (0,2), (1,2), (1,3), (1,4), (4,5)])

# Check if the graph is AT-free
is_atfree = nx.is_at_free(G)
print(is_atfree)
<|EOT|>
