code: def _ftdf_words():
      return pd.DataFrame(
          data=[["woof woof", "dog"], ["meow meow", "cat"]],
          columns=["txt", "lbl"],
      )
  
imports: import pytest
  import pandas
  from sklearn.model_selection import cross_val_score
  from skift import FirstColFtClassifier, IdxBasedFtClassifier, ColLblBasedFtClassifier, FirstObjFtClassifier, SeriesFtClassifier
label_desc: Use image node_id 3 for calling a global function with example usage: _ftdf_words() and returns: pd