Happy man grilling meat on his barbecue.
an angry man grills vegetables on a barbecue.
One cannot be happy and angry at the same time, and meat is not vegetables.
exists e1 s1 x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_barbecue(x3) & of(x3,x1) & n_male(x1) & n_meat(x1) & Actor(e1,x1) & v_grill(e1) & of(x1,x2) & n_man(x2) & a_happy(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_barbecue(x3) & Theme(e1,x2) & Actor(e1,x1) & v_grill(e1) & n_vegetable(x2) & n_man(x1) & a_angry(s1) & Theme(s1,x1))