extracting semantic text features from, the media content and the URL, wherein the extracting the semantic text features is determined according to a set of extraction rules, wherein the set of extraction rules comprises at least one rule specifying surrounding text be within a threshold semantic distance from {HEAD ~ a piece} of {TAIL ~ the media content} 
extracting semantic text features from , the media content and the URL , wherein the extracting the semantic text features is determined according to a set of extraction rules , wherein the set of extraction rules comprises at least one rule specifying surrounding text be within a threshold semantic distance from { HEAD ~ a piece } of { TAIL ~ the media content }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL