rtokens: -- London Newsroom +44-171-542 7717
pos: DT NN , WDT MD VB NN NN , VBZ VBN TO VB NN IN CD .
tokens: The system , which would use satellite technology , is scheduled to enter service in 2000 .
ltokens: The system is responsible for the control of aircraft flying transatlantic routes from Europe and North America .