Making sure there is input

Hi I am new to lectora and I am building a project for a client. Right now I have two questions on a page, and I am trying to tell lectora that user MUST enter text before going to the next page. I am not sure on how to do this.While playing around I found the Condition tap in the actions. I have it all filled but I am not sure what goes in the values box. Is there anyway I can check to see if there is text put into these two fields before they goto the next page?

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