Imagine you need to know what is happening at a certain location. How could you achieve that? A search engine might be a choice, but the information may be outdated since the page was crawled. Radio and TV news can broadcast in real-time, but they focus only on hot events. Social networks can also be real-time, but how to request what you want and quickly spread your question?
['Xiaoming Leng', 'Ying Yan', 'Yang Chen', 'Börje F. Karlsson', 'Thomas Moscibroda']
Therenow: what is happening over there, right now?