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 {HEAD ~ the set} of extraction rules comprises {TAIL ~ at least one rule} specifying surrounding text be within a threshold semantic distance from a piece of the media content 
comprises
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 { HEAD ~ the set } of extraction rules comprises { TAIL ~ at least one rule } specifying surrounding text be within a threshold semantic distance from a piece of 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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH