A man with a white helmet stands on a snowy mountaintop.
The hiker climbed a mountain.
You can not infer he is on the mountain.
exists e1 s1 s2 x1 x2 x3.(on(e1,x3) & n_mountaintop(x3) & a_snowy(s2) & Theme(s2,x3) & Actor(e1,x1) & v_stand(e1) & with(x1,x2) & n_helmet(x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_hiker(x1) & n_mountain(x2) & Time(e1,x2) & Actor(e1,x1) & v_climb(e1))