question: What does J. Barrie Jones feel stands supreme of Chopin 's concert pieces ?
answer: the four ballades and four scherzos
turker_answer: J. Barrie Jones feels the four ballades and four scherzos stand supreme of Chopin 's concert pieces .
rule-based: J. Barrie Jones feels the four ballades and four scherzos stands supreme of Chopin 's concert pieces .