Original sentence: One of the most famous political uses of cassette tapes was the dissemination of sermons by the Ayatollah Khomenei throughout Iran before the 1978 Iranian revolution, in which Khomenei urged the overthrow of the regime of the Shah
Edited sentence: One of the most famous political uses of cassette tapes was the dissemination of sermons by the Ayatollah Khomenei throughout Iran before the 1978 Iranian revolution, in which Khomenei urged the overthrow of the oppressive and un-Islamic regime of the Shah