instruction:
In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to provide one question which clarifies the input question and it has one unique answer, and also provide an answer to the generated question. Generated question and answer should be separated with a new line.
question:
Who was the first person to use fossils for dating rock layers?
answer:
Who was the first person to use fossils for dating rock layers theoretically? 
 Nicolaus Stenonius


question:
How many seasons is there of the simpsons?
answer:
How many seasons is there of the simpsons that started in 2017 or earlier? 
 29


question:
What is the most current software for mac?
answer:

What mac operating system software was released on September 25, 2017? 
 macOS High Sierra