Data not passed to run_summarization.py

Amazon SageMaker
5

Looking at the source code for run_summarization.py, the error seems to be in the __post_init__ call of DataTrainingArguments here:

if self.dataset_name is None and self.train_file is None and self.validation_file is None:
            raise ValueError("Need either a dataset name or a training/validation file.")

So it looks like the data from S3 is not parsed to train_file, looking at the train_file argument it seems to expect a csv or json, rather than a location on S3

train_file: Optional[str] = field(
        default=None, metadata={"help": "The input training data file (a jsonlines or csv file)."}
    )

Am I right in conluding from this that the run_summarization script cannot be used with data from S3?