on the category of the phrase.

</a><ul><a name="-CLR">
<li><b>on S or SBAR</b> - These categories are usually arguments, so the -CLR tag indicates that the clause is more adverbial  
than normal clausal arguments.  The most common case is the infinitival semi-complement of <i>use</i>, but there are a variety  
of other cases.

</li></a><li><a name="-CLR"><b>on PP, ADVP, SBAR-PRP, etc</b> - On categories that are ordinarily interpreted as (adjunct) adverbials, -CLR indicates  
a somewhat closer relationship