Complex sentence: Lognkosauria is a group of giant long-necked sauropod dinosaurs within the clade Titanosauria, and includes some of the largest and heaviest dinosaurs to ever walk the earth.
Split into simpler sentences: Lognkosauria is a group of giant long-necked sauropod dinosaurs within the clade Titanosauria. It includes some of the largest and heaviest dinosaurs to ever walk the earth.