Read the passage. [1] A humanities course combined historical maps, newspapers, and census records in one research project. [2] Students processed the sources in the digital humanities lab during scheduled work sessions. [3] The digital humanities lab is a collaborative workspace equipped for computational analysis of cultural materials. [4] Teams documented each transformation so that their results could be checked. Which choice turns the definition or identification in sentence [3] into a concise appositive in sentence [2]?