A man sits on the stairs next to his bike.
Some stairs have a man and bike on them.
A man that sits on the stairs next to his bike means some stairs have a man and a bike on them.
exists e1 x1 x2 x3.(n_bike(x3) & of(x3,x2) & n_male(x2) & n_stair(x2) & to(e1,x3) & r_next(e1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3 x4.(on(e1,x1) & n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_bike(x4) & n_man(x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_stair(x1))