In the absence of subsymbol refinement (i.e., when subsymbol z is set to be identical to coarse symbol s), our model simplifies in some respects.
the HDP gener-ation of z is obviated and word x is drawn from a word distribution φ s indexed solely by coarse symbol s. The resulting simplified model closely resembles DMV (Klein and Manning, 2004), except that it 1) explicitly generate words x rather than only partof-speech tags s, 2) encodes richer context and valence information, and 3) imposes a Dirichlet prior on the symbol distribution θ.