In Chapter MVC QuestionGroup.basicPhrases() gets called but was never before implemented.
I can assume what it does, but the code won’t compile. I suggest to add an implement?
@funkymusic Thanks very much for your question!
If you look at the resources that come with the book, the file “QuestionGroupData” is provided for you which contains the method “basicPhrases()”. 
I hope this helps!
All the best!
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