Complex sentence: He oversaw the visit to Tehran in late September 2001 by then foreign minister Jack Straw, the first visit to the country by a senior a British government minister since the 1979 Revolution.
Split into simpler sentences: He oversaw the visit to Tehran in late September 2001 by the then foreign minister Jack Straw. It was the first visit to the country by a senior a British government minister since the 1979 Revolution.