question: Who grouped 23 unpublished pieces and published them as Opp . 66-73 in 1855 ?
answer: Julian Fontana
turker_answer: Julian Fontana grouped 23 unpublished pieces and published them as Opp . 66-73 in 1855 .
rule-based: Julian Fontana grouped 23 unpublished pieces and published them as Opp . 66-73 in 1855 .