Complex sentence: Also in Granada, de Falla began work on the large-scale orchestral cantata "Atlàntida" ("Atlantis ") based on the Catalan text"L'Atlàntida" by Jacint Verdaguer, which he considered to be the most important of all his works.
Split into simpler sentences: Also in Granada, de Falla began work on the large-scale orchestral cantata "Atlàntida" ("Atlantis "), based on the Catalan text"L'Atlàntida " by Jacint Verdaguer. De Falla considered"Atlàntida" to be the most important of all his works.