Tristan und Isolde -LRB- Tristan and PERSON@1 , or Tristan and Isolda -RRB- is an opera , or music drama , in three acts by PERSON@2 to a MISC@1 libretto by the composer , based largely on the romance by PERSON@3 .

Tristan und Isolde -LRB- Tristan and Isolde -RRB- is an opera in three acts by PERSON@2 .
