Help with scrape sensor and nth

Hi

I’m trying to use the scrape sensor in a similar fashion to this:

I can successfully scrape the first value of max, min, etc.

What I can’t work out is how to combine the value I want with nth-of-type. i.e. I try something like .max:nth-of-type(3) and it doesnt work. (in this example I’m trying to get the 3rd max temp value from this page http://www.bom.gov.au/vic/forecasts/melbourne.shtml)

can anyone help?