an [implicit] reference link

[implicit]: http://example.com

an [implicit][] reference link with an empty link definition

an [implicit][] reference link followed by [another][]

[another]: http://cnn.com

an [explicit][example] reference link with a title

[example]: http://example.com "Example"

<p>an <a href="http://example.com">implicit</a> reference link</p>
<p>an <a href="http://example.com">implicit</a> reference link with an empty link definition</p>
<p>an <a href="http://example.com">implicit</a> reference link followed by <a href="http://cnn.com">another</a></p>
<p>an <a href="http://example.com" title="Example">explicit</a> reference link with a title</p>