Complex sentence: When the tapes were released back to NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, in about 1986, the decision of whether to scrap the tapes became the responsibility of archivist Nancy Evans.
Split into simpler sentences: When the tapes were released back to NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, in 1986. The decision of whether to scrap the tapes became the responsibility of JPL archivist Nancy Evans.