Getting Antonyms

[mehmetilker]

I can get only adjective's antonyms. When I read related function I see that there is a condition to limit antonym result with adjective. Is there any specific reason ? Because I can see verb's antonyms in wordnet portal http://wordnetweb.princeton.edu/perl/webwn

function _formAntonymsArray(synsetid){ var query = "SELECT sw.lemma AS lemma, dw.lemma AS antonym, sdefinition AS synset FROM sensesXlexlinksXsenses AS l "; query += "LEFT JOIN words AS sw ON l.swordid = sw.wordid LEFT JOIN words AS dw ON l.dwordid = dw.wordid "; query += "WHERE sw.lemma ='" + word + "' AND linkid=30 AND spos='a' ORDER BY ssensenum"; return db.allAsync(query); }