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

Ex Input:
Passage: Zinc reacting with hydrochloric acid produces bubbles of hydrogen gas. Answer: hydrogen

Ex Output:
Zinc reacting with hydrochloric acid produces bubbles of which gas?

Ex Input:
Passage: Blood Blood is considered a connective tissue because it has a matrix, as shown in Figure 33.17. The living cell types are red blood cells (RBC), also called erythrocytes, and white blood cells (WBC), also called leukocytes. The fluid portion of whole blood, its matrix, is commonly called plasma. Answer: connective

Ex Output:
What type of tissue is blood?

Ex Input:
Passage: Brain Stem The midbrain and hindbrain (composed of the pons and the medulla) are collectively referred to as the brain stem (Figure 13.12). The structure emerges from the ventral surface of the forebrain as a tapering cone that connects the brain to the spinal cord. Attached to the brain stem, but considered a separate region of the adult brain, is the cerebellum. The midbrain coordinates sensory representations of the visual, auditory, and somatosensory perceptual spaces. The pons is the main connection with the cerebellum. The pons and the medulla regulate several crucial functions, including the cardiovascular and respiratory systems and rates. Answer: cerebellum

Ex Output:
What part of the brain is attached to the brain stem but considered a separate region of the adult brain?