RegEx Print a Custom Line

This is an example of my code with Lua

local p = io.popen('nslookup myip.opendns.com resolver1.opendns.com', 'r');
local output = p:read('a+');
p:close();
print (output)

Whose output is something like the following:

Server: resolver1.opendns.com
Address: 208.67.222.222

Name: myip.opendns.com
Address: 85.185.195.150

But I want only Address: 85.185.195.150 to be printed
How can I do this?

local p = io.popen('nslookup hostname resolver | grep -o -E "^Address:.([0-9.]{2,4}){4}$" | tail -n1', 'r');

local p = io.popen('nslookup hostname resolver | tail -n2', 'r');