Complex sentence: The U.S. Secretary of State, Hillary Clinton said the Yemeni people deserve the right to demonstrate peacefully, to freely assemble, and to express themselves without fear of being harmed.
Split into simpler sentences: The U.S. Secretary of State, Hillary Clinton, expressed liberty to the Yemeni people. She mentioned that the Yemeni people deserve the right to demonstrate peacefully, to freely assemble, and to express themselves without fear of being harmed.