What will be the output of the following JavaScript code?
<ol class="dp-xml" start="1">
 	<li class="alt"><span class="tag">&lt;</span><span class="tag-name">script</span><span class="tag">&gt;</span></li>
 	<li class=""></li>
 	<li class="alt">var <span class="attribute">article</span> = {</li>
 	<li class="">              "main title": "How to learn JavaScript",</li>
 	<li class="alt">              'sub-title': "The Definitive Guide",</li>
 	<li class="">              "for": "all audiences",</li>
 	<li class="alt">              author: {</li>
 	<li class="alt">                         firstname: "Scott",</li>
 	<li class="alt">                         surname: "McCall"</li>
 	<li class="">                      }</li>
 	<li class="alt">           }</li>
 	<li class=""><span class="tag">&lt;/</span><span class="tag-name">script</span><span class="tag">&gt;</span></li>
</ol>