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Challenging in example sentence

What do you got? "How many of your organs have been 3D printed?" (Laughter) Well I have to say that I don't know about how many of my organs have been 3-D printed as such, but I can tell you that it is so challenging to me, kind of thinking about this concept of the future and that, you know, all around the world parents are kind of telling their small children, please, you have to eat that, you know, I have slaved over a hot 3D printer all day so that you can have this meal.
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