Complex sentence: That night, K vanishes, remembered only by J. O shows J a statue to K, killed by Boris in 1969, but since J knows too much, realizes his chocolate milk craving is a result of temporal fracture.
Split into simpler sentences: That night, K vanishes, remembered only by J. O shows J a statue to K, killed by Boris in 1969. J realizes his chocolate milk craving is a result of a temporal fracture.