African man standing in a field outside.
A farmer is standing in his field.
An African man is not necessarily a farmer.
exists s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x3) & n_outside(x3) & of(x3,x4) & n_field(x4) & n_standing(x1) & of(x1,x2) & n_man(x2) & a_african(s1) & Theme(s1,x1))
exists e1 x1 x2.(in(e1,x2) & n_field(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_stand(e1) & n_farmer(x1))