Complex sentence: McCain, his family, and their baby-sitter had made nine trips at Keating's expense, sometimes aboard Keating's jet; three of the trips were made during vacations to Keating's opulent Bahamas retreat at Cat Cay.
Split into simpler sentences: McCain, his family, and their baby-sitter had made nine trips at Keating's expense, sometimes aboard Keating's jet. Three of the trips were made during vacations to Keating's opulent Bahamas retreat at Cat Cay.