sentence1: `` What does '' `` Hammerklavier '' '' sonata -LRB- no. 29 -RRB- , whose last movement contains an especially diabolical fugue '' '' mean ? ''
sentence2: `` What does '' '' '' `` Hammerklavier '' '' sonata -LRB- no. 29 -RRB- , whose last movement contains an especially diabolical fugue '' '' mean ? ''