text: The<unk>  (or<unk>  plane) is a vertical<unk>  crossing through the clavicle.
option_0: Midclavicular line
option_1: Sternocostal surface
option_2: Sternal plane
option_3: Left sternal border
option_4: Floating rib
option_5: Left margin of heart
option_6: Cervical rib
option_7: Subcostal plane