This example doesn't show that it can generate content based on Twitter writing of a specified account, in this case realDonaldTrump.
It shows that it knows that realDonaldTrump is the Twitter ID of Donald Trump, and that it can write in the very widely known (and frequently parodied) style of that user, and format the result as a tweet (complete with a hash tag).
So it works because Trump is famous, there is a lot of writing out there that exhibits his style and it knows how to emulate Twitter style.
I bet I can get it to do the same for a famous celebrity who doesn't use Twitter.
Just tried "write a tweet about McDonald's in the style of twitter user realDanielCraig" - Daniel Craig isn't on Twitter - and got this:
> "Just scarfed down a Big Mac and fries at McDonald's. Sometimes you just gotta treat yourself. #BondFuel #McDonalds"
And for realKateWinslet (also not on Twitter):
> "Just had a healthy meal at McDonald's with a side of their tasty apple slices. Love finding healthy options on the go! #McDonalds"
It shows that it knows that realDonaldTrump is the Twitter ID of Donald Trump, and that it can write in the very widely known (and frequently parodied) style of that user, and format the result as a tweet (complete with a hash tag).
So it works because Trump is famous, there is a lot of writing out there that exhibits his style and it knows how to emulate Twitter style.
I bet I can get it to do the same for a famous celebrity who doesn't use Twitter.
Just tried "write a tweet about McDonald's in the style of twitter user realDanielCraig" - Daniel Craig isn't on Twitter - and got this:
> "Just scarfed down a Big Mac and fries at McDonald's. Sometimes you just gotta treat yourself. #BondFuel #McDonalds"
And for realKateWinslet (also not on Twitter):
> "Just had a healthy meal at McDonald's with a side of their tasty apple slices. Love finding healthy options on the go! #McDonalds"