Complex sentence: He composed the chorale cantata in 1725 in Leipzig for the feast of the Annunciation and first performed it on 25 March 1725, which fell that year on Palm Sunday.
Split into simpler sentences: He composed the chorale cantata in 1725 in Leipzig for the feast of the Annunciation and first performed it on 25 March 1725. Bach first performed it on 25 March 1725, which in that year was also Palm Sunday.