Original sentence: He gives 150 BCE (Patanjali) as a terminus ante quem (latest possible date) for all Vedic Sanskrit literature, and 1200 BCE (the early Iron Age) as terminus post quem for the Atharvaveda
Edited sentence: He gives 150 BCE (Patanjali) as a terminus ante quem for all Vedic Sanskrit literature, and 1200 BCE (the early Iron Age) as terminus post quem for the Atharvaveda