shell:$ nslookup -timeout=2 -retry=1 'stage7.duolingo.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	stage7.duolingo.com
Address: 52.70.243.68
Name:	stage7.duolingo.com
Address: 52.3.197.9
Name:	stage7.duolingo.com
Address: 34.199.217.178