Lesson-5.markdown

@@ -28,7 +28,7 @@ For this exercise we used a LEGO model build according to the description in [2]
 
 ![Robot with light sensor mounted](https://gitlab.au.dk/rene2014/lego/raw/master/Lesson5/Images/LightSensorRobot.JPG)
 
-We know that the surface which the robot is placed on affects the control mechanism and therefore three different materials is tested. These are a blank white table, a wooden table and the carpet floor. These surfaces are shown in the following picture.
+We know that the surface which the robot is placed on affects the control mechanism and therefore three different materials is tested. These are a blank white table, a wooden table and a carpet floor which is shown in the following picture.
 
 ![Surfaces which the self-balancing robot is tested on](https://gitlab.au.dk/rene2014/lego/raw/master/Lesson5/Images/LightSensorSurfaces.jpg)