Complex sentence: His close personal ties to Bloomberg extends to his spouse, Fabiana Mesquita-Wierson, was one of the top executives at Bloomberg, LP; based in Brazil, she had been the executive responsible for expanding Bloomberg's operations throughout Latin America.
Split into simpler sentences: His close personal ties to Bloomberg extends to his spouse, Fabiana Mesquita-Wierson, a former top executive at Bloomberg, LP. Based in Brazil, she had been the executive responsible for expanding Bloomberg's operations throughout Latin America.