Complex sentence: Astringent persimmons contain very high levels of soluble tannins and are unpalatable if eaten before completely softened, though the sweet, delicate flavor of fully ripened persimmons of varieties that are astringent when unripe is particularly relished.
Split into simpler sentences: Astringent persimmons contain very high levels of soluble tannins and are unpalatable if eaten before completely softened. However, the sweet, delicate flavor of fully ripened persimmons of varieties that are astringent when unripe is particularly relished.