input: Write a python function to load a dataset from a .npz file and extract its contents.
  assert load_data('data.npz') == (np.array(['title1', 'title2']), np.array(['text1', 'text2']), np.array([0, 1]))
  assert load_data('another_data.npz') == (np.array(['title3', 'title4']), np.array(['text3', 'text4']), np.array([1, 0]))
output: def load_data(file_path):
      import numpy as np
      data = np.load(file_path)
      titles = data['titles']
      texts = data['texts']
      labels = data['labels']
      return titles, texts, labels