Today I gave a talk on sentiment and semantics in visual text analytics at CANVAS 2014, the Canadian Visual Analytics Summer School. The summer school gathers together graduate students, academic, and industry researchers in visual analytics from across Canada. There have been many great talks which are going to be archived online. My talk today introduced students to the language technologies we most often use in the lab, including NLTK. I also discussed our work on visualizing semantics and sentiment in various research projects, as well as highlighting some great research by other people. Check out the slides!