… . . . . . . . . . . . 152 Recall-Oriented Learning of Named Entities in Arabic Wikipedia Behrang Mohit, Nathan Schneider, Rishav Bhowmick, Kemal Oflazer and Noah A. Smith . . . . 162 ix Tree Representations in Probabilistic Models for Extended Named Entities Detection Marco Dina…

…es the electromagnetic force. The best description I’ve found so far comes from Wikipedia: viz., photons are ‘chunked ripples in a field, or “excitations”, that “look like” particles’ (Wikipedia s.v.; emphasis added). That is, a photon can be considered as a discretely located (w…