SNePS Exercises

These exercises are adapted from Martins 2002, and were designed to give practice in representing information in SNePS using the SNePSUL semantic-network-oriented interface.

Represent the following paragraphs in SNePS. Each exercise is to be considered as a connected paragraph, so you should use a single network, but you can split it up into separate parts (as indicated by the sentence numbers) for ease of reading if you wish.

However, if you represent some concept with a node in one part of the network, then you should represent that same concept with the same node if it reappears in another part of the network (that's part of what's called the "uniqueness principle").

You may use either a graphical net (hand-drawn is fine) or SNePSUL code. Give the syntax and semantics of each case frame you use. See the SNePS Case Frame Dictionary [postscript] or the CVA Case Frame Dictionary for ideas and examples.

1. 1. Anna knows that John bought a dog.
   2. The dog is a German Shepherd.
   3. John paid 300 dollars for the dog.
   4. Anna also knows that Stu sold his dog.
   5. Anna believes that John bought Stu's dog.

   Answer:

   Note: Answer files are closed; they will be opened on the due date or can be obtained from Prof. Rapaport
   • demo file
   • script of demo

   ---

2. 1. John is a professor and earns $50,000 a year.
   2. His friends believe that he earns much more.
   3. They do not know that he earns as much as a police officer.

   Answer:

   Note: Answer files are closed; they will be opened on the due date or can be obtained from Prof. Rapaport
   • demo file
   • script of demo