Sentence:  Chopin's Prelude op. 28 no. 6 comprises 403 notes which give rise—in just one sub-domain (pitch class)—to around 13,000 potential primary <WSD>zygons</WSD>, 500 million potential secondary <WSD>zygons</WSD>, and 1018 potential tertiary <WSD>zygons</WSD>. 
Meaning of the word marked with <WSD> tags:  An affinity or connection in a piece of music between tones, chords, or phrases, such that one part appears to repeat, to imitate, or to derive from the other, especially when perceived as an organising principle in the music; a zygonic relationship.