tokens: The keyboard navigation for scrollbars used Left and Up for upwards ( leftwards ) movement , as well as Right and Down for downwards ( rightwards ) movement .
ner_tags: O B-Device O O B-User_Interface_Element O B-Keyboard_IP O B-Keyboard_IP O O O O O O O O O O B-Keyboard_IP O B-Keyboard_IP O O O O O O O