Sentence:  I found the Tube trains morbidly fascinating, I had a simpler enthusiasm for the <WSD>escalators</WSD>. Everyone likes going on <WSD>escalators</WSD> as far as I know. It feels like a free ride, and the longer  they are, the better. The only <WSD>escalator</WSD> in York was at Marks & Spencer's, and people would hesitate for ages before getting on, apparently waiting for the right stair to come rolling along, whereas Londoners would step on while reading a newspaper. 
Meaning of the word marked with <WSD> tags:  A motor-driven mechanical device consisting of a continuous loop of steps that automatically conveys people from one floor to another.