<｜begin▁of▁sentence｜>### Instruction:
Given a nested list structure `nested_list = [[1, 2, [3, 4]], [5, 6], [7], [8, 9]]`, how can we convert it into a flat list using the `flatten` utility from the NetworkX package?
### Response:
from networkx.utils import flatten

# Nested list structure
nested_list = [[1, 2, [3, 4]], [5, 6], [7], [8, 9]]

# Flatten the nested list
flat_list = list(flatten(nested_list))

print(flat_list)
<|EOT|>
