Complex sentence: In December 2010, Ranariddh came out of retirement to lead the NRP again, and after a failed attempt to merge the NRP and FUNCINPEC, Ranariddh announced his retirement for a second time.
Split into simpler sentences: In December 2010, Ranariddh came out of retirement to lead the NRP again. After a failed attempt to merge the NRP and FUNCINPEC, Ranariddh announced his retirement for a second time.