I don't really understand this. I tried going at this as described with treating it as a natural language processor. I tried every iteration of 'calculate every

I don't really understand this. I tried going at this as described with treating it as a natural language processor. I tried every iteration of 'calculate every prime number between 1 and 1000' i could think of. It was an error every time. I looked through the examples after and it seems to be a mix of natural language and formal programming constructs. I don't really understand how to use this properly. It reminds me a bit of inform7 except less clear as to what's actually acceptable syntax.