sentence2_structure: a baby<>called<>a(n) infant<>During the first year after birth
sentence1: Adult females give birth to their first infant                     between 13 and 15 years old and maximally they give birth                     to four infants during all their life.
sentence2: During the first year after birth, a baby called a(n) infant.
question: During the first year after birth, what is a baby called?