You are given a sentence and your task is to generate another sentence that supports the given input.

Input: Consider Input: According to Darwin's theory of evolution, natural selection means only the organisms best adapted to their environment tend to survive and transmit their genetic characters in increasing numbers to succeeding generations while those less adapted tend to be eliminated.

Output: Evolution occurs by natural selection, a process whereby better-adapted members pass along their traits, according to darwin.

Input: Consider Input: Infants are birth to one year.

Output: During the first year after birth, a baby called a(n) infant.

Input: Consider Input: Birth typically occurs at about 38 weeks after fertilization, so the fetal period generally lasts about 30 weeks.
Output: The fetal period lasts approximately 30 weeks weeks.