Make a GET request to https://stealth-ed-task.herokuapp.com/search?q=topic , where q is the the topic you want questions for.
Example request:
https://stealth-ed-task.herokuapp.com/search?q=movement%20of%20substances
The script that migrates data from the app to the DB in a tree structure can be found here https://github.com/codenaz/stealth-ed/blob/master/utils/export-csv-to-database.js