instruction:
In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to write a question that clarifies the given question in such a way that the generated question has one unique answer.
question:
Who wanted to create a railroad from cape town to cairo?
answer:
Who wanted to create a railroad from cape town to cairo originally?


question:
Who has been the youngest president of usa?
answer:
Who has been the youngest president to be succeeded to the office of usa?


question:
What is a black spider with yellow stripes?
answer:

What is the common name for a black spider with yellow stripes?