Today is International Drawing Day! For the love of pencils, pens, quills and whatever else you can draw with, we’re celebrating with a contest. While each of these six SFMOMA works is technically a drawing, there’s more to each than meets the eye. We’ve got a nifty prize from the Museum Store to give away to the first 4 who can identify each work’s artist and title, plus how each drawing stretches the limits of the medium. *Respond to SFMOMAsays@sfmoma.org with your answers!