28. The system of claim 21 wherein the instructions causing the processor to create a second class for each of the sentential forms in the vocabulary comprise instructions that, when executed by the processor, cause the processor to: for each placeholder of each sentential form in the vocabulary, create an attribute for the placeholder within the class created for the corresponding sentential form.
29. The system of claim 28 wherein the instructions causing the processor to create an attribute for the placeholder comprise instructions that, when executed by the processor, cause the processor to: assign a name to the attribute using the text of the term specified for the placeholder.