Complex sentence: The infants use their sense of smell in finding the nipple, as shown in a 1994 study in which one of the breasts was washed with unscented soap and the baby preferred the other one.
Split into simpler sentences: The infants use their sense of smell in finding the nipple. As shown in a 1994 study in which one of the breasts was washed with unscented soap and the baby preferred the other one.