... constituent and depen-dency parsing (Collins and Duffy, 2002; McDon-ald et al., 2005), and logical form extraction (Zettle-moyer and Collins, 2005).Machine learning research for structured ... vectors. For stability, we impose the con-straint that the sum of the updates in each step shouldbe zero. We assume that the possible output valuesare {yi}mi=0 and, for convenience, that y0is ... low performance. The reason for this may be that Laplacian priors tend to promote sparse solutions(see Krishnapuram et al. (2005), inter alia), and that this sparsity is detrimental for this...