A complex sentence is a sentence consisting of an independent clause and a subordinating clause. Or, to put it more simply, complex sentences involve more than just a straightforward noun + verb. Complex sentences include extra phrases added to a base sentence, but which cannot stand alone as a sentence. For example:
Published 4:00 am, Thursday, January 9, 1997. 1997-01-09 04:00:00 PDT Yosemite National Park -- Yosemite Valley is slowly drying out after what park rangers are calling the worst flood here in recorded history, leaving behind hundreds of upturned tent-cabins and acres of wrecked camping sites.
A drinking fountain is available near the trailhead in Camp 4. Bring 4 quarts/liters of water if hiking to the top of Yosemite Falls. Restrooms Restrooms are not available along the trail; the nearest ones are in Camp 4 near the trailhead. Parking The Yosemite Falls trailhead is located along the Valley Loop Trail near Camp 4. The Camp 4 parking area is for campers only, but there is a day-use parking area across the street from, and just beyond, immediately beyond the entrance to Camp 4.