diff --git a/workshop.html b/workshop.html
index 8bf524c..36f309b 100755
--- a/workshop.html
+++ b/workshop.html
@@ -184,7 +184,7 @@ <h2 id="section1"> Aims and scope </h2>
                                 A core issue is the difficulty in dealing with
                                 environmental variability caused by external
                                 sources of uncertainty as well as noisy
-                                sensors and actuators. The root of this
+                                sensors and actuators. At the root of this
                                 difficulty is the fact that many of the
                                 principles involved are based on a classical,
                                 qualitative perspective whilst the underlying