Convolution Kernels for Opinion Holder Extraction

Michael Wiegand, Dietrich Klakow · Publication Server of the Institute for German Language (Institute for German Language) · 2010

c ha s"W h a td o e s [X ] l i k ea b o u t [Y ] ?" ) .S u c hs y s t em sn e e d t ob ea b l e t o d i s t i n g u i s hw h i c h e n t i t i e s i n a c a n d i d a t e a n sw e r s e nt e n c e a r e t h e s o u r c e so fo p i n i o n s ( =o p i n i o nh o l d e r ) a n dw h i c ha r e t h e t a r g e t s .O no t h e rN L P t a s k s , i np a r t i c u l a r ,o n r e l a t i o n e x t r a ct i o n , t h e r eh a sb e e nm u c hw o r ko n c o n v o l u t i o nk e rn e l s , i .e .ke r n e l f u n c t i o n se x p l o i t i n gh u g eam o u n t s o ff e a t u r e s w i t h o u ta ne x p l i c i tf e a t u r er e p r e s e n t at i o n .P r e v i o u s r e s e a r c ho n t h a t t a s kh a ss h o w n t h a t c o n v o l u t i o nk e r n e l s ,s u c ha s s e q u e n c ea n d t r e ek e rn e l s ,a r eq u i t ee f f e c t i v ew h e nc om p a r e d t o m a n u a l f e a t u r ee n g i n e e r i n g(M o s c h i t t i ,2 0 0 8 ;B u n e s c ua n d M o o n e y ,2 0 0 5 ; N g u y e ne ta l .,2 0 0 9 ) .

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