Although the Museum of Outdoor Arts is mostly about sculpture in public spots around metro Denver, it also maintains a set of indoor galleries at its headquarters in Englewood. This past winter, Joel Swanson: Polysemic was installed in these inside spaces, along with one additional outside piece: a billboard titled "Respectfully" that was erected in the MOA's Sculpture Alley, next to the building. "Respectfully" referred to the common closing salutation, which Swanson freed from its context and meaning — and that's what he did with everything inside, as well. The show opened with three installations presented as one; in each, Swanson had taken a source — product packaging in the first, Zapf Dingbat symbols in the second and envelopes in the third — and then stripped it down to its basic form, in the process changing its meaning. He's particularly fascinated with language, and a wallpaper installation and a suspension piece were both based on palindromes, words spelled the same way forward and backward. Don't be fooled by all this heady content, though: Swanson always ensures not only that his work is about ideas, but that it's beautiful, too, so you can just look at it without worrying about what it means.