A data engineer is preparing a large tabular dataset stored as CSV files in Amazon S3 to train a SageMaker built-in algorithm (Linear Learner). Training jobs are running slowly because the algorithm must parse the raw CSV text on every epoch. The engineer wants to use an AWS Glue ETL job to output the data in a format that SageMaker built-in algorithms can stream efficiently with Pipe mode. Which output format should the Glue job produce?