Fix dataset reference error

spanish_medica_llm.py

@@ -525,7 +525,7 @@ def configAndRunTraining(basemodel, dataset, eval_dataset, tokenizer):
  
  trainer = Trainer(
  model= basemodel,
- train_dataset = dataset['train'],
+ train_dataset = dataset,
  eval_dataset = eval_dataset,
  args = training_args,
  data_collator = data_collator_pretrain