A man in a gray hat pushes some type of equipment over ice.
A man is preparing to jump out of a plane for his birthday.
If somebody pushes equipment over ice, they are on the ground, not preparing to jump out of a plane.
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x3) & Actor(e1,x1) & v_push(e1) & over(x3,x5) & n_ice(x5) & of(x3,x4) & n_equipment(x4) & n_type(x3) & in(x1,x2) & n_hat(x2) & a_gray(s1) & Theme(s1,x2) & n_man(x1))
exists e1 p1 x1 x3.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2 x2.(of(e2,x2) & for(x2,x3) & n_plane(x2) & r_out(e2) & Actor(e2,x1) & v_jump(e2)) & n_birthday(x3) & of(x3,x1) & n_male(x1) & n_man(x1))