Complex sentence: After government funding ceased in 1952, the last oil shale operation in Australia at Glen Davis was closed, with production not resuming until the commencement of the Stuart Oil Shale Project in the late 1990s.
Split into simpler sentences: After government funding ceased in 1952, the last oil shale operation at Glen Davis was closed. Production did not resume until the Stuart Oil Shale Project in the late 1990s.