Part 1. Definition
In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.
Part 2. Example
Tracy slept awkwardly on their new bed and was having some pain, so Tracy cracked her neck. 
Question: What did Tracy do with her neck?
Answer: crack her neck
Explanation: The output phrase perfectly answers the question and is explicitly mentioned in the passage as well.
Part 3. Exercise
The first step in taking the underground was determining where I  wanted to go. Then, I consulted Google maps on my phone. I opened the app and typed in my destination. I then selected the public transportation tab and pressed the navigate button. The app told me that I should take the red train to my destination. The station was just a couple of blocks away. I walked there and followed the instructions on the app as to which train to get (red train, northbound). I purchased a ticket at the ticket machine using my credit card. I scanned my ticket, then went through the turnstile. I followed the signs to the correct platform and waited a few minutes to for the train to arrive. When it got there, I waited for the people to exit the train before getting on. The app told me to get off after three stops. Once I got off, I followed the signs to the exit. 
Question: How many stops did they pass before they got to their stop?
Answer:
2