Given a scientific passage and an answer, generate a question for the given answer.

Ex Input:
Passage: The atmosphere protects living things from the Sun's most harmful rays. Gases reflect or absorb the strongest rays of sunlight. Figure below models this role of the atmosphere. Answer: the atmosphere

Ex Output:
What is the name of the protective layer of gases that surrounds the earth and blocks harmful rays from the sun?

Ex Input:
Passage: Photography by Kat. Ferns are common in the understory of the tropical rainforest . CC BY 2.0. Answer: understory

Ex Output:
In a tropical rainforest, where are ferns common?

Ex Input:
Passage: Toward the late stages of pregnancy, a drop in progesterone and stretching forces from the fetus lead to increasing uterine irritability and prompt labor. Contractions serve to dilate the cervix and expel the newborn. Delivery of the placenta and associated fetal membranes follows. Answer: newborn

Ex Output:
Toward the late stages of pregnancy, a drop in progesterone and stretching forces from the fetus lead to increasing uterine irritability and prompt labor. contractions serve to dilate the cervix and expel this?