shell:$ nslookup -timeout=2 -retry=1 'stage7.duolingo.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	stage7.duolingo.com
Address: 54.175.157.73
Name:	stage7.duolingo.com
Address: 54.92.188.105