What do you call a group of visual artists inspired by the death of Michael Brown and the social-justice movement it spawned? St. Louis curator Freida Wheaton calls them the “Sweet 16.” It’s a nod to their numbers as well as a reference to their niche. On Feb. 26-27, you can see the work of these St. Louis artists at the Touhill, in conjunction with “New Dance Horizons IV.” Dance St. Louis’ annual event presents three world premieres this year, inspired by legendary St. Louisans Maya Angelou,