Before revision:  However, as our systematic examination reveals, it is still challenging for such models to generate coherent long passages of text ( > 1000 tokens), especially when the models are fine-tuned to the target domain on a small corpus.
After revision:  However, as our systematic examination reveals, it is still challenging for such models to generate coherent long passages of text ( e.g., 1000 tokens), especially when the models are fine-tuned to the target domain on a small corpus.