AttributeError: 'OutputSeq' object has no attribute 'saliency'

[Claus1]

captum 0.5.0 torch 1.13.0+cu117

Language_Models_and_Ecco_PyData_Khobar.ipynb

text= "The countries of the European Union are:\n1. Austria\n2. Belgium\n3. Bulgaria\n4."
output_3 = lm.generate(text, generate=20, do_sample=True)
output_3.saliency()

AttributeError Traceback (most recent call last) Cell In [13], line 1 ----> 1 output_3.saliency()

AttributeError: 'OutputSeq' object has no attribute 'saliency'