14. One or more computer storage media of a client device storing computer-executable instructions that, when executed by one or more processors of the client device, configure the one or more processors to perform operations comprising: receiving one or more syntactic dependency trees; accessing a database, wherein the database comprises a first event and a second event, wherein the first event comprises a first event type, a first cause entity, and a first theme entity, and wherein the second event is a nested event of the first event, wherein the second event comprises a second event type, a second cause entity, and a second theme entity, wherein one of the second cause entity and the second theme entity is the first event, and wherein an event type comprises an action by a cause entity, and wherein the cause entity comprises at least one causal entity, and a theme entity comprises at least one resultant entity caused by the cause entity through imposing the event type; and performing semantic parsing on the one or more syntactic dependency trees to generate one or more annotated syntactic trees, wherein the semantic parsing comprises: mapping each node of a plurality of nodes in the one or more syntactic dependency trees to an event state based on the database, wherein the event state comprises one of the first event type, the second event type, and a null value; and mapping each edge of a plurality of dependency edges in the one or more syntactic dependency trees to an argument state based on the database, wherein the argument state comprises one of the first cause entity, the first theme entity, the second cause entity, the second theme entity, and the null value.
15. The one or more computer storage media of claim 14 , the operations further comprising: generating, by the one or more processors, an event table based on the one or more annotated syntactic dependency trees, wherein the event table comprises: an event type, an event cause entity, and an event theme entity, and wherein the event table comprises one or more nested events.