The final element in Wikidata is rank. Ranks allow for setting a preference among multiple values that apply to the same property. You would use ranks for changes in population, reoccurring events, or if there is conflicting data about a value. Wikidata expresses preferred rank with the up arrow, as you can see in the image above. The middle circle indicates normal rank and the down arrow means deprecated rank. Wikidata has values for decades of life expectancy statistics in Uruguay. The image shows the preferred rank for life expectancy of Uruguay from a few years ago.