question: radar:electromagnetic waves:detection
choices.label: A B C D
choices.text: tv:lcd screen:tv series wardrobe:board:clothing pen:ink:writing computer:keyboard:mouse
explanation: "radar" can be used for "electromagnetic wave" "detection" of electronic equipment, "electromagnetic wave" is the way, "detection" is the function. "lcd screen" is part of "tv". the raw material of the "wardrobe" is "wooden board". "pen" can be used for "ink" and "writing", "ink" is the way, and "writing" is the function. both "keyboard" and "mouse" are part of "computer".
relation: radar electromagnetic waves detection R3.10
relation: lcd screen tv R2.3
relation: board wardrobe R3.7
relation: pen ink writing R3.10
relation: keyboard computer R2.3
relation: mouse computer R2.3