Complex sentence: Sembrano permanently replaced Sanchez as she is on an indefinite leave due to the impending campaign of her husband Mar Roxas as president for the upcoming 2016 presidential elections and this marks her return to the anchor chair after 4 years she left her weekend anchor stint.
Split into simpler sentences: Sembrano permanently replaced Sanchez as she is on an indefinite leave due to the impending campaign of her husband Mar Roxas as president for the upcoming 2016 presidential elections. This also marks her return to the anchor chair after 4 years she left her weekend anchor stint.