question: What did Beethoven expand in his Symphonies , 3 , 5 , 6 and 9 ?
answer: timbral `` palette ''
turker_answer: Beethoven expanded timbral `` palette '' in his Symphonies , 3 , 5 , 6 and 9
rule-based: Beethoven expanded timbral `` palette in his Symphonies , 3 , 5 , 6 and 9 .