diff --git a/core/index.html b/core/index.html
index 0249f57..e11fbf5 100644
--- a/core/index.html
+++ b/core/index.html
@@ -613,7 +613,7 @@ <h2>Model</h2>
     <p>
       The object types defined by the vocabulary are segmented into a set of
       eight core types and an extended set of Activity and Object types common
-      to many social Web applications. The core types include:
+      to many social Web applications. The core types are:
       <ul>
         <li><a>Object</a>,</li>
         <li><a>Link</a>,</li>