Understanding Solr MoreLikeThis Result

I'm on my way to learn to use Solr.

Im learning to use MoreLikeThis right now. and if I doing Query, which is like this

http://localhost:8080/solr/开发者_开发知识库select/?q=terbang&indent=on&mlt=true&mlt.fl=entry

I get a more like this result like this

<lst name="moreLikeThis"> 
 <result name="67244" numFound="0" start="0"/> 
 <result name="67250" numFound="0" start="0"/> 
 <result name="146" numFound="0" start="0"/> 
 <result name="3993" numFound="0" start="0"/> 
 <result name="11758" numFound="0" start="0"/> 
 <result name="14828" numFound="0" start="0"/> 
 <result name="20820" numFound="0" start="0"/> 
 <result name="23336" numFound="0" start="0"/> 
 <result name="24267" numFound="0" start="0"/> 
 <result name="24779" numFound="0" start="0"/> 
</lst> 

I dont really understand whats the meaning of the "name" attribute. And why is there many results with different name if its not found anything anyway?

The numbers in the name attribute are the unique keys of the documents in the results.