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.

Who developed a method to mass-produce steel in america?
Who patented a method to mass-produce steel in America? 
 Henry Bessemer

Who is the father of emma on friends?
Which character is the father of emma on friends? 
 Ross Geller, Ph.D.

Who is the current leader of saudi arabia?

Who is the leader of saudi arabia from 2015 to 2020? 
 Salman bin Abdulaziz Al Saud