Both similarity of edges and Wikipedia are useful in filtering out heterogeneous collections from news events, while Wikipedia can also separate some news and topics.
there are several problems with this approach: 1) newsworthiness cannot distinguish news from some topics, includes horoscope topics ("sagittarius; approach; big trouble") and topics such as "hitler; fox; megan fox; rip; megan; selena gomez", which contain segments that can also frequently occur in Wikipedia; 2) as a single measure, newsworthiness is subject to a tradeoff between precision and recall, while a high precision can be obtained only with an extremely low recall (about 10%).