The entire gravity.list contains entries that could possibly match this description. It is inherited to using lists that you haven't made or checked yourself. To overcome this problem, this would be a solution, but running that script takes hours, if not days, It's fairly pointless to run that script, unless you absolutely want to know the real value of gravity.list.
Running this script (checklist.sh) takes only a minute or so, and would give you at least an idea of how many new entries would be added.