diff --git a/Procedural-cosmetic-filters.md b/Procedural-cosmetic-filters.md
index 6be0c4a..7046011 100644
--- a/Procedural-cosmetic-filters.md
+++ b/Procedural-cosmetic-filters.md
@@ -68,4 +68,4 @@ Same as `:matches-css(...)` except that the style will be looked-up for `:after`
 - Examples:
     - `facebook.com##:xpath(//div[@id="stream_pagelet"]//div[starts-with(@id,"hyperfeed_story_id_")][.//h6//span/text()="People You May Know"])`
 
-The `:xpath(...)` operator is different than other operators. Whereas all other operators are used to filter down a resultset of elements, the `:xpath(...)` operator can be used bot to create a new resultset or filter down an existing one. For this reason, _subject_ is optional.
+The `:xpath(...)` operator is different than other operators. Whereas all other operators are used to filter down a resultset of elements, the `:xpath(...)` operator can be used bot to create a new resultset or filter down an existing one. For this reason, _subject_ is optional. For example, an `:xpath(...)` operator could be use to create a new resultset consisting of all ancestors elements of a subject element, something not otherwise possible with either plain CSS selectors or other procedural operators.