improvise.01
frames- *-1 Keeping the mood light , [ARG0 the two] [ARGM-TMP 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 , [ARGM-ADV with Mr. Gomez] , soared and [rel improvised] on [ARG1-on the composer 's tight `` Bebop Etudes] . ''