Spelling error in docs, Getting Started, section 03
![spelling error in docs](https://user-images.githubusercontent.com/1487974/79264572-1671b900-7e95-11ea-8707-49e4c596a70b.PNG)

In the Getting Started tutorials, section 03 "How to get subsets from a DataFrame", the paragraph beginning:

> We now from before...

should be:

> We know from before...