premise: In hemodialysis,          a dialysis machine and a special filter called an artificial kidney, or          a dialyzer, are used to clean your blood.
hypothesis: Hemodialysis has a patient’s blood pass through a length of tubing that travels through an artificial kidney machine.
hypothesis_graph_structure: a length of tubing<>travels<>$$$Hemodialysis<>has<>a patient's blood pass through a length of tubing$$$a patient's blood<>pass<>through a length of tubing