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

Input: Consider Input: Passage: Models may be physical, conceptual, or mathematical. Answer: mathematical

Output: Models may be physical, conceptual, or what else?

Input: Consider Input: Passage: As we studied in our chapter on the periodic table, we saw that elements share a number of important properties with other elements found in the same group. The chemical behavior of a given element is largely dictated by the configuration of its valence electrons. Many elements have a tendency to gain or lose electrons in order to achieve a more stable configuration. When a neutral atom gains or loses electrons, it becomes an ion. In this lesson, we will look at ways to predict what type of ion a given element is likely to form. Answer: it becomes an ion

Output: What happens when a neutral atom gains or loses electrons?

Input: Consider Input: Passage: In binary fission, a cell splits in two. First, the large circular chromosome is copied. Then the cell divides to form two new daughter cells. Each has a copy of the parent cell's chromosome. Answer: two
Output: In binary fission how many times does a cell split?