 
 <prompt> Archaeopteryx na part of which group? Based on di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: ```Di fossil record show say birds na di last dinosaurs wey survive, dem evolve from ancestors wey get feather inside di theropod group of saurischian dinosaurs. True birds first show face during di Cretaceous period, about 100 million years ago. DNA-based evidence show say birds diversify well well around di time wey di Cretaceous–Paleogene extinction event happun wey kill all oda dinosaurs. Birds for South America survive dis event and den migrate go oda parts of di world through multiple land bridges while dem dey diversify during periods of global cooling. Primitive bird-like dinosaurs wey no dey inside class Aves proper, inside di broader group Avialae, don dey found since di mid-Jurassic period. Many of dis early "stem-birds", like Archaeopteryx, no fit fly well well yet, and many still get primitive characteristics like teeth for mouth instead of beaks, and long bony tails.``` 