[yolesaber]

This is because he is only extracting the noun phrases from the sentence. If you adapted his code to tag verb phrases as well (by modifying the semi-CFG and the normalize_tags method) then you could also extract "discovering" and "curating" as well.

[RBerenguel]

But this would miss the "main topics," since when you have both the vp's and the np's you have everything :/ Here is the resulting tree (it's unformatted, sorry, I tweaked an old Prolog grammar I had for analysing search keywords and tweets):

[[[[Swayy,snp],np],[is,[a,[[beautiful,new,dashboard,snp],np],np_],vp],simple_s],for,[[discovering,simple_s],and,[[curating,[[online,content,snp],np],vp],simple_s],s],s]