a man in a hat operates machinery on smooth ice in the winter.
A man is operating heavy machinery on icey roads.
A man who wear hat operates machinery on ice roads in winter.
exists e1 s1 x1 x2 x3 x4 x5.(n_winter(x5) & in(e1,x5) & on(e1,x4) & n_ice(x4) & a_smooth(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_operate(e1) & n_machinery(x3) & in(x1,x2) & n_hat(x2) & n_man(x1))
exists e1 s1 s2 x1 x2 x3.(on(e1,x3) & n_road(x3) & a_icey(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & n_machinery(x2) & a_heavy(s1) & Theme(s1,x2) & n_man(x1))