Fast Computing Grammar-driven Convolution Tree Kernel for Semantic Role Labeling

Grammar-driven convolution tree kernel (GTK) has shown promising results for semantic role labeling (SRL). However, the time complexity of computing the GTK is exponential in theory. In order to speed up the computing process, we design two fast grammar-driven convolution tree kernel (FGTK) algorithms, which can compute the GTK in polynomial time. Experimental results on the CoNLL-2005 SRL data show that our two FGTK algorithms are much faster than the GTK.