{
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    "source_url": "https://ftp.ncbi.nlm.nih.gov/sra/reports/Mirroring/NCBI_SRA_Mirroring_20260831/meta_sample_set.xml.gz",
    "output_dir": "s3://omicidx/sra/raw/sample/date=2026-08-31/stage=Incremental"
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}