Add links to Parsons Input Format spec document and examples list

parsons/index.html

@@ -19,7 +19,13 @@ <h1>SPLICE Working Group: Parsons Problems Interoperabilty Standards</h1>
             a <a href="https://cssplice.github.io/peml/index.html">PEML</a>-based
             file format that hopes to capture most of the Parsons
             problem variations that are being used.
-            For examples, see the <a href=" https://github.com/CSSPLICE/peml-feasibility-examples">examples repository</a>.
+            <ul>
+              <li> See the draft <a href="https://docs.google.com/document/d/1ZzEgS4_2SyS88fhWVp0041KmfWFnXBKgMWmPEDI7chw/edit?usp=sharing">problem definition specification</a>.
+                <li> See the <a href="
+                https://github.com/CSSPLICE/peml-feasibility-examples">examples
+                    repository</a>.
+                  <li> See <a href="https://docs.google.com/spreadsheets/d/1kojEwnOUAFfXfU_ptP2iWcYhPloguF6gH43qFQpCX-E/edit?usp=sharing">descriptions of the examples</a>.
+                  </ul>
           <li> Consistent generation of output event traces (probably
             in a file format based on <a href="../progsnap2/index.html">ProgSnap</a>).
         </ul>