Repeated the above procedure with a WORD document

 This time, I had a go with a WORD file uploaded to GPT-5-mini. The WORD file contains some lecture notes. The key words in the notes were in quotation marks. 

I uploaded the file to GPT-5-mini, and used the same prompt. 

It worked again!

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Then I tried again with the key words being bolded. The result is not good. 

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then, just now I simply copied some lecture notes into the prompt, and asked the AI to convert the key words into blank filling. The result is not very good: AI is still not adept at choosing the key words.