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

Input: Consider Input: Passage: The composition of the magma determines if the rock is mafic, felsic, or intermediate. Answer: intermediate

Output: The composition of the magma determines if the rock is mafic, felsic, or what?

Input: Consider Input: Passage: The body of a cnidarian consists of two cell layers, ectoderm and endoderm. The cells surround a digestive cavity called the coelenteron (see Figure below ). Cnidarians have a simple digestive system. The single opening is surrounded by tentacles, which are used to capture prey. The tentacles are covered with nematocyst cells. Digestion takes place in the coelenteron. Nutrients are absorbed and gases exchanged through the cells lining this cavity. Fluid in the coelenteron creates a hydrostatic skeleton. Answer: tentacles

Output: Cnidarians have a simple digestive system with a single opening surrounded by what type of structures, which are used to capture prey?

Input: Consider Input: Passage: The human genome has 23 pairs of chromosomes located in the nucleus of somatic cells. Each chromosome is composed of genes and other DNA wound around histones (proteins) into a tightly coiled molecule. Answer: 23
Output: How many pairs of chromosomes are in the human genome?