Table 2.

Adversarial text attack levels and corresponding text modification examples.

Adversarial text attack level	Original text	Modified text
Character-level	"The quick brown fox jumps over the lazy dog."	"The quxck b!own fox jumps ov3r the 14zy d@g."
Word-level	"The movie was really good."	"The movie was quite bad."
Sentence-level	"Climate change is a global concern. We must take action to reduce carbon emissions."	"Climate change isn't a concern. There's no need to reduce carbon emissions."

Significant values are in bold and underline.