Complex sentence: They did not immediately accept the thesis, as it was found to be weak-it was subjected to an oral exam for two and a half hours and Saif al-Gaddafi was asked to revise and re-submit it.
Split into simpler sentences: They did not immediately accept the thesis, as it was found to be weak. It was subjected to an oral exam for two and a half hours and Saif al-Gaddafi was asked to revise and re-submit it.