TASK DEFINITION: In this task you're given a question and you have to paraphrase the question to create the output question while retaining the meaning of the original question.
PROBLEM: What advancements in physics were gained from zero-gravity experiments?

SOLUTION: What is the most interesting discovery to come from a zero gravity experiment carried out on the ISS?

PROBLEM: How can I buy fake passports online?

SOLUTION: How much does a fake passport cost to buy?

PROBLEM: What and where can I sell the source code for an app?

SOLUTION:
Where can I sell source code?