extracting {HEAD ~ 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 {TAIL ~ surrounding text} be within a threshold semantic distance from a piece of the media content 
extracting { HEAD ~ 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 { TAIL ~ surrounding text } be within a threshold semantic distance from a piece of the media content
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH