| http://www.w3.org/ns/prov#value | - This site is the best for both students and teachers, other websites such as facebook and lot of more social sites are just a tool of business and spying, they are trying to induce frustration & incline its users towards Daily boon doogles consuming hell of time, but as compared to facebook Google+ is hundred times better, just you have to maintain your online contacts adding anyone you know or yo
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