question_text: The company that created a keychain RFDI device created to allow electronic payment at McDonald's and 400 other Chicago area restaurants is headquartered in what city and state?
decomposition: return the keychain RFDI device created  to allow electronic payment at McDonald 's and 400 other Chicago area restaurants ;return the company that created  #1 ;return the city where  #2 is  headquartered ;return the state where  #2 is  headquartered ;return #3 , #4