Original sentence: Yasna is the Avestan language name of Zoroastrianism's principal act of worship, and also the name of the primary liturgical collection of Avesta texts, recited during that yasna ceremony
Edited sentence: Yasna (or yazna, from sanskrit yajna) is the Avestan language name of Zoroastrianism's principal act of worship, and also the name of the primary liturgical collection of Avesta texts, recited during that yasna ceremony