Original: Abigail "Abby" Loraine Hensel and Brittany "Britty" Lee Hensel (born March 7, 1990, Carver County, Minnesota, United States), are highly symmetric dicephalic parapagus conjoined twins, and further, tribrachius, bipedus.
Simplified: Abigail and Brittany Hensel (born March 7, 1990 in Minnesota, United States) are conjoined twins with mostly one body and two heads.