See http://cweiske.de/tagebuch/ublock-element-containing.htm
Store "news":
##:xpath(//div[contains(@class,"morefeatures") and .//a[@href="https://boingboing.net/author/boingboingstore"]]) ##:xpath(//div[contains(@class,"feature") and .//a[@href="https://boingboing.net/author/boingboingstore"]])