Complex sentence: In short, though historically a part of Yemen since ancient times, it was annexed by Saudi Arabia.indeed, there was a strong treaty between King Abdulaziz and the people from Najran indicates conditions that have to be respected by the both sides.
Split into simpler sentences: In short, though historically a part of Yemen since ancient times, it was annexed by Saudi Arabia. Indeed, there was a strong treaty between King'Abdul' Azīz and the people from Najrān indicates conditions that have to be respected by the both sides.