long: PERSON@1 gave lectures on each of the nine symphonies of PERSON@2 which were followed by a performance of the symphony in piano duet arrangement played by PERSON@1 and PERSON@3 .
  
short: PERSON@4 gave lectures about each of the nine symphonies by PERSON@2 , after which he and PERSON@3 would play the whole symphony in a piano duet arrangement .
  