input: from typing import List
  
  def predict_class_labels(features: List[float]) -> int:
      """ Predict the class label for a given set of data with 4 features: Length, Width, Height, and Weight.
      >>> predict_class_labels([1.5, 2.3, 3.1, 0.8])
      1
      >>> predict_class_labels([2.0, 2.5, 4.0, 1.5])
      0
      """
output:     if features[0] < 2.0 and features[1] < 2.5 and features[2] < 3.5 and features[3] < 1.0:
          return 1
      else:
          return 0