a boy in a red jacket is jumping in the sand
Nobody is jumping
A boy is not nobody.
exists e1 s1 x1 x2 x3.(n_sand(x3) & in(e1,x3) & Actor(e1,x1) & v_jump(e1) & in(x1,x2) & n_jacket(x2) & a_red(s1) & Theme(s1,x2) & n_boy(x1))
-exists e1 x1.(Actor(e1,x1) & v_jump(e1) & n_person(x1))