Complex sentence: The Swamp Prinia or Assam Prinia, "Prinia cinerascens", is a wren-warbler of the Indian subcontinent, often considered a subspecies of the Rufous-vented Prinia.
Split into simpler sentences: The Swamp Prinia or Assam Prinia, "Prinia cinerascens", is a wren-warbler of the Indian subcontinent. Some authorities consider it a subspecies of the Rufous-vented Prinia.