Theodor Kullak said of the piece , `` the design and poetic contents of this nocturne make it the most important one that Chopin created ; the chief subject is a masterly expression of a great powerful grief . ''
PROPN PROPN VERB ADP DET NOUN , `` DET NOUN CCONJ ADJ NOUN ADP DET ADV VERB PRON DET ADV ADJ NOUN DET PROPN VERB ; DET ADJ NOUN AUX DET ADJ NOUN ADP DET ADJ ADJ NOUN . ''