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

Input: Consider Input: Passage: Most metalloids have some physical properties of metals and some physical properties of nonmetals. They fall between metals and nonmetals in their ability to conduct heat and electricity. They are shiny like metals but brittle like nonmetals. All exist as solids at room temperature. Answer: silicon

Output: What is an example of a metaloid element?

Input: Consider Input: Passage: Modern reptiles live in many different habitats. They can be found on every continent except Antarctica. Answer: reptiles

Output: Modern members of what broad animal group live in many different habitats and are found on every continent except antarctica?

Input: Consider Input: Passage: The oldest crust is coldest and lies deepest in the ocean. Answer: oldest
Output: Which crust lies deep inside the ocean?