Abstract: The main process of event extraction based on kernel dependency graph(KDG)is to find and match the semantic structure. A Vietnamese-English-Chinese FrameNet on the South China Sea news has been built to explore the specific application of semantic structure extraction including KDG semantic analysis model, KGD automatic generation and event templates extraction based on KDG. The research focuses are the analysis models for typical KDGs, special KDGs of Null Instantiated Frame Element and frame element fusion; the representation method of KDG for event information extraction; the process of KGD automatic generation from annotated sentences. It is demonstrated that event extraction based on KDG is driven by linguistic motivation and feasible to find out the semantic clues of news texts by its intuitiveness. At the present, it is possible to generate KDG automatically from the frame-semantic annotated sentences and extract the corresponding event templates.

Key words: event extraction, Vietnamese, kernel dependency, news