Sentence:  On April 4 2018, the first commercial trains began running between London and Amsterdam. Current <WSD>Eurostar</WSD> Chief Executive Mike Cooper said: "The departure of our first commercial service to Amsterdam represents a historic milestone for <WSD>Eurostar</WSD> and the growth of international high-speed rail." 
Meaning of the word marked with <WSD> tags:  A high-speed passenger train service connecting London with mainland European cities via the Channel Tunnel.