A man and a woman are coming down an escalator.
Several people use a moving staircase.
A man and woman can be rephrased to several people. An escalator is a type of moving staircase.
exists e1 s1 x1 x2 x3 x4.(n_escalator(x4) & Time(e1,x4) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_come(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists e2 e1 s1 x1 x2.(Theme(e2,x2) & Actor(e2,x1) & v_use(e2) & n_staircase(x2) & Actor(e1,x2) & v_move(e1) & n_people(x1) & a_several(s1) & Theme(s1,x1))