<prompt> Translate the following text to SwahiliAccording to Michael Lee of the University of Sydney and Michael Caldwell of Chicagos Field Museum, the 100-million-year-old fossil, christened Pachyrachis problematicus problematic thick-ribbed animal in the late 1970s, is a proto-snake with two legs.  <response>: Michael Lee wa Chuo Kikuu cha Sydney na Michael Caldwell wa Chicagos Field Museum, wanasema kwamba nyoka huyo mwenye umri wa miaka milioni 100 aliitwa Pachyrachis problematicus mnyama mwenye mbavu nzito mwishoni mwa miaka ya 1970. 