code: def y_airlines():
      """Load sample data from the airlines dataset."""
      return load_airline()
  
imports: import numpy
  import pandas
  import pytest
  from pandas.testing import assert_series_equal
  from sktime.datasets import load_airline, load_longley
  from sktime.forecasting.model_evaluation import evaluate
  from sktime.forecasting.structural import UnobservedComponents
  from sktime.split import SlidingWindowSplitter
  from sktime.utils.validation._dependencies import _check_soft_dependencies
label_desc: Use image node_id 3 for calling a global function with example usage: y_airlines() and returns: load_airline