A man is crosscountry skiing.
A man is sledding down a mountain.
SKIING IS NOT SLEDDING
exists p1 x1.(exists s1 x2.((x1 = x2) & n_skiing(x2) & a_crosscountry(s1) & Theme(s1,x2)) & n_man(x1))
exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_sled(e1) & n_mountain(x2) & n_man(x1))