Objects in image: Billboard
Text visible in image: WORLD'S, PREMIEL, ER, 5, CONFERENCE, AND, EXPOSITION, 0, 1ste2011, philadelphia, JUNE, JUNE, 26-, 26-29, Pennsylvania, Convention, Center
Question: what is the year on the event?
Answers: 2011, 2011, 2011, 2011, 2011, 2011, 2011, 2011, 2011, 2011