Complex sentence: Operation Jaque was a Colombian military operation that resulted in the freedom of 15 hostages, including former presidential candidate Íngrid Betancourt, that had been held by the Revolutionary Armed Forces of Colombia (FARC).
Split into simpler sentences: Operation Jaque was a Colombian military operation that resulted in the freedom of 15 hostages, including former Columbian presidential candidate Íngrid Betancourt. The hostages had been held by the Revolutionary Armed Forces of Colombia (FARC).