 
     markBubble:
       content: '''
-        We're primarily looking for bubbles like the one in the bottom-left of this image. Let's mark it now.
+        We're looking for bubbles like the one in the bottom-left of this image. Let's mark it now.
       '''
 
       instruction: '''

      '''

      instruction: '''
        Drag out a circle aroudnt he EGO until it is contained.
      '''

    callOutTalk:

      '''

      instruction: '''
        Drag the other point of the ellipse to match the bubble.
      '''

    selectClusterTool:
      content: '''
        Great! We also want to find stars clusters.
        Let's mark the cluster of bright stars off to the right.
      '''

      instruction: '''
