Complex sentence: Having only 8th grade educations, Floyd and Hilder were originally circus performers, Floyd a trapese gymnast while Hilder did a "slide for life," gliding down a wire in front of the crowd while hanging only by her teeth.
Split into simpler sentences: Having only 8th grade educations, Floyd and Hilder were originally circus performers. Floyd was a trapese gymnast and Hilder did a "slide for life," gliding down a wire in front of the crowd while hanging only by her teeth.