A helmet-clad man rides a 4-wheeler through muddy waters.
A man is walking in the mud.
If a man rides, he isn't walking.
exists e1 s1 s2 x1 x2 x3.(through(e1,x3) & n_waters(x3) & a_muddy(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_4-wheeler(x2) & n_man(x1) & a_helmet-clad(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_mud(x2) & in(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1))