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

Example Input: Passage: Earth's climate has changed many times. Long warm periods were broken up by ice ages. Over the past 150 years, climate has warmed quickly. Answer: ice ages
Example Output: What occurs between long warm climate periods?

Example Input: Passage: Similarly, monoprotic bases are bases that will accept a single proton. Diprotic acids contain two ionizable hydrogen atoms per molecule; ionization of such acids occurs in two steps. The first ionization always takes place to a greater extent than the second ionization. For example, sulfuric acid, a strong acid, ionizes as follows: K a1 = more than 10 2 ; complete dissociation. Answer: accepts one proton
Example Output: What is the basic characteristic of monoprotic bases?

Example Input: Passage: Cell division Mitosis M Cell growth stops at this stage. Mitosis divides the nucleus into two nuclei, followed by cytokinesis which divides the cytoplasm. Two genetically identical daughter cells result. Answer: cytoplasm
Example Output:
What is divided during cytokinesis?