Complex sentence: Black Mesa East is a resistance base, located in the outskirts of City 17, opposite to a dam, its generating station, and its reservoir, and right next to the abandoned mining town of Ravenholm.
Split into simpler sentences: Black Mesa East is a resistance base, located in the outskirts of City 17, opposite a dam. It's generating station, and its reservoir, are right next to the abandoned mining town of Ravenholm.