Complex sentence: In 1982, four surviving F-111As were provided to Australia as attrition replacements and modified to F-111C standard; these were fitted with the longer-span wings and reinforced landing gear of the C-model.
Split into simpler sentences: In 1982, four surviving F-111As were provided to Australia as attrition replacements and modified to F-111C standard. These were fitted with the longer-span wings and reinforced landing gear of the C-model.