| http://www.w3.org/ns/prov#value | - as you can see, the routine is this, there is a class for the current menu and whenever a user hover into one of the menu, the class of the current menu is removed and a class current_item added to the current hover menu and in mouseout event, the class current_item is removed from the current hovered element and the class current_item is added back to the current menu which has also a class
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