readme: ### google/flan-t5-base finetuned on xsum dataset
  
  #### train args<br>
  max_input_length: 512<br>
  max_tgt_length: 128<br>
  epoch: 3<br>
  optimizer: AdamW<br>
  lr: 2e-5<br>
  weight_decay: 1e-3<br>
  fp16: False<br>
  prefix: "summarize: "<br>
  
  #### performance<br>
  eval_rouge1: 38.6648<br>
  eval_rouge2: 15.5661<br>
  eval_rougeL: 30.6158<br>
  
  #### usage<br>
  from transformers import AutoTokenizer, AutoModelForSeq2SeqLM<br>
  