Complex sentence: After the 2006 riots, the situation of the country lost stability following the the military intervention of Malaysia, Australia, New Zealand and Portugal; nations who are now trying to support the development of East Timor.
Split into simpler sentences: After the 2006 riots, the situation of the country lost stability following the military intervention of Malaysia, Australia, New Zealand, and Portugal. These four nations are now trying to support the development of East Timor.