python source.py

curl -X POST -H "Content-Type: application/json" -d '{"url": "https://en.wikipedia.org/wiki/Brazil"}' http://127.0.0.1:5000/index_url

curl -X POST -H "Content-Type: application/json" -d '{"url": "https://en.wikipedia.org/wiki/Brazil", "question": "what is the population of Brazil?"}' http://127.0.0.1:5000/ask