SRL for [chortled]: Keeping the mood light , the two then chanted and [chortled] their way through some murderous polyrhythms , devised by Mr. Douglas as an alternative to Hindemith 's dry theory - teaching techniques , and then , with Mr. Gomez , soared and improvised on the composer 's tight `` Bebop Etudes . ''
ARG-M-ADV: Keeping the mood light | ARG-0: the two | ARG-M-TMP: then | ARG-1: their way | ARG-M-DIR: through some murderous polyrhythms , devised by Mr. Douglas as an alternative to Hindemith 's dry theory - teaching techniques