Before revision:  Utilizing a learning-based mechanism, UniTrigger can generate a fixed phrase that  when added to any benign inputs, can drop the prediction accuracy of a textual neural network (NN) model to near zero on a target class.
After revision:  Utilizing a learning-based mechanism, UniTrigger can generate a fixed phrase that , when added to any benign inputs, can drop the prediction accuracy of a textual neural network (NN) model to near zero on a target class.