sentences:  "Trifles", a chamber opera in one act, premiered in Berkeley, California, at the Live Oak Theatre on June 17 and 19, 2010 was composed by John G. Bilotta and its libretto was written by John F. McGrew.The chamber opera is scored for five singers and six instruments, including a piano, and it requires some basic stage props.As in the play, the central figures (Mr. and Mrs. Wright) are absent from the cast of characters.