How to parse information from a page without saving this page to disk (wget, curl, grep)?

Question

linux

Tried like this

wget -O- http://kronikprostatit.org/memberlist.php?mode=team | grep rss

But something doesn’t work, I read the man page on wget and curl, but I can’t do something. Tell me what the plug is, a Google search gave similar commands, though none of them worked)
Thank you all for your time.

Answer 1

And what is wrong?
For example:
Returns all lines (one in this case) containing the word "Powered" (by)

Answer 2

wget -qO- http://kronikprostatit.org/memberlist.php?mode=team | grep javascript