This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Passage: The Science Museum Oklahoma (formerly Kirkpatrick Science and Air Space Museum at Omniplex) houses exhibits on science, aviation, and an IMAX theater. The museum formerly housed the International Photography Hall of Fame (IPHF) that exhibits photographs and artifacts from a large collection of cameras and other artifacts preserving the history of photography. IPHF honors those who have made significant contributions to the art and/or science of photography and relocated to St. Louis, Missouri in 2013. Question: When was the International Photography Hall of Fame relocated?
2013