Two men are barbecuing their food while another prepares the meat.
Two men are cooking
Barbecuing is a form of cooking.
exists e1 p1 x1 x2 x4.(n_meat(x4) & exists e2 x3.(Theme(e2,x4) & Actor(e2,x3) & v_prepare(e2) & n_thing(x3)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_barbecue(e1) & n_food(x2) & of(x2,x1) & n_thing(x1) & n_man(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_cook(e1) & n_man(x1) & card_eq_2(x1))