question: How is the special sercice mode enabled ?
answer: by a key switch either inside the elevator itself or on a centralized control panel in the lobby
turker_answer: The special sercice mode is enabled by a key switch either inside the elevator itself or on a centralized control panel in the lobby .
rule-based: The special sercice mode is enabled by a key switch either inside the elevator itself or on a centralized control panel in the lobby .