Totally, six different methods were implemented. The abbreviation DEP stands for the dependency-based graph kernel, PAS stands for the graph kernel based on predicate-argument-structure, SC stands for semantic class information, and ReSC stands for refined semantic class information. DEP_SC means that semantic class information is incorporated into the dependency-based graph kernel. Precision (P), Recall (R) and F-measure (F1) were reported for each method. The highest performance under each evaluation criterion is bolded.
a means the performance difference between the underlying method and DEP is statistically significant
b means the performance difference between the underlying method and PAS is statistically significant. (p-value < 0.05)