"Every two years, the District of Columbia Arts Center must...

"Every two years, the District of Columbia Arts Center musters a group of local artists as the latest Sparkplug collective. The closing exhibition of the current cohort, "States of Being," has a theme well suited to 2020: uncertainty. A few of the nine artists in the show, curated by Fabiola R. Delgado, offer pieces that are somewhat in flux. But most of the artworks are permanently fixed objects that take uncertainty as a subject or an element of a technique." (Fonte: ummmsaarrgaley-showws-n-dc/2 020/12/300eed9e000c493c111ebb-a99d9911e3e4aa 9228b9_storyhhmml d49e00c-493c-11eb-a9d9-1e3ec4a928b9_story.html)
According to the text, what was the theme of the closing exhibition "States of Being"?