Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: Carbon 14 isotope of carbon is typically used to date ancient items.

Output: What isotope of carbon is typically used to date ancient items?


Input: Consider Input: Humans have 23 pairs pairs of chromosomes.

Output: How many pairs of chromosomes do human have ?


Input: Consider Input: Scapulae bones are flat and triangular and located at the back of the pectoral girdle.
Output: Which bones are flat and triangular and located at the back of the pectoral girdle?