text: Title: In tf1.13.1 version, bert performs downstream tasks, how to run bert on multiple GPUs?
  Body: Written on github:Yes, all of the code in this repository works out-of-the-box with CPU, GPU, and Cloud TPU. However, GPU training is single-GPU only.
  
  When bert completes downstream tasks and performs fine_tune, can't he train on multiple GPUs? If not, when can the downstream task be trained on the bert model of multiple GPUs? Because, when a very large long text is trained for bert, an error will be reported and the efficiency will be low