Complex sentence: The United Nations Security Council and many countries including the US class al-Nusra as a terrorist state; it was the official Syrian branch of al-Qaeda until July 2016, when it ostensibly split.
Split into simpler sentences: The United Nations Security Council and many countries including the US class al-Nusra as a terrorist state. It was the official Syrian branch of al-Qaeda until July 2016, when it ostensibly split.