Complex sentence: Marloes Coenen was originally set to defend her title against no.1 contender Miesha Tate; however, on February 23, it was announced that Tate had to withdraw from the contest and her replacement would be Liz Carmouche.
Split into simpler sentences: Marloes Coenen was originally set to defend her title against no.1 contender Miesha Tate. However, on February 23, it was announced that Tate had to withdraw from the contest and her replacement would be Liz Carmouche.