Complex sentence: In 1983, the newly restructured Stephenson Company started producing the Order of Canada, the country's highest civilian decoration, which up until that time had been produced in England by crown jeweler Garrards of London.
Split into simpler sentences: In 1983, the newly restructured Stephenson Company started producing the Order of Canada, the country's highest civilian decoration,. Up until The Stephenson company was granted permission to produce the award, it had been produced solely in England by crown jeweler Garrards of London.