An old man is grilling food in a backyard.
The backyard grill was being used by the elderly man.
old man refers to elderly man.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_backyard(x3) & Theme(e1,x2) & Actor(e1,x1) & v_grill(e1) & n_food(x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(n_man(x3) & a_elderly(s1) & Theme(s1,x3) & n_grill(x1) & of(x1,x2) & n_backyard(x2) & Actor(e1,x3) & Theme(e1,x1) & v_use(e1))