merge x and x + n lines

I am writing a script which returns 15 lines of titles and 15 lines of URLs.

title 1
title 2
title 3
*snip*
title 14
title 15
http://example.com/query?1 
http://example.com/query?2 
http://example.com/query?3 
*snip*
http://example.com/query?14 
http://example.com/query?15 

I'd like to merge it in such a way that produces the following output:

title 1 http://example.com/query?1 
title 2 http://example.com/query?2 
title 3 http://example.com/query?3 
*snip*
title 15 http://example.com/query?15 

Upon light inspection and the guidance of this answer , I found the command

. However,

does not allow for the performance of more complex behaviors like the ones described above. Is there another tool or combination of tools I can use in order to accomplish the aforementioned behavior? Do note that I'm looking to use all standard coreutils behavior, if at all possible.