text: The first movement of a work written for this ensemble introduces an unusually long theme in 3/2 time that spans more than three octaves, the first of twelve themes in the work.
full_question: The first movement of a work written for this ensemble introduces an unusually long theme in 3/2 time that spans more than three octaves, the first of twelve themes in the work. Lawrence Foster orchestrated that work for this ensemble, which features movements marked "Tres fougueux" and "Mouvement de valse bien rythmée" and is a C major work by Georges Enescu. Both a Niels Gade work in F major and a Max Bruch work in B-flat major were written for this ensemble. Another work for this ensemble features a scherzo that was later orchestrated to replace the minuet in its composer's first symphony; that scherzo was inspired by a passage from the "Walpurgisnacht" section of Goethe's Faust. The finale of that work for this ensemble quotes from Handel's "Hallelujah Chorus" and was completed shortly before its composer's Overture to A Midsummer Night's Dream. For 10 points, a young Felix Mendelssohn wrote an E-flat major work for what ensemble that is sometimes composed of two string quartets?
first_sentence: The first movement of a work written for this ensemble introduces an unusually long theme in 3/2 time that spans more than three octaves, the first of twelve themes in the work.
raw_answer: tring octets [prompt on "octets" or "double string quartets"]