Men tend meat at the makeshift barbecue.
Men cook the pork at the barbecue.
Not all meat at a barbecue is pork.
exists e1 x1 x2 x3 x4.(n_barbecue(x3) & of(x3,x4) & n_makeshift(x4) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_tend(e1) & n_meat(x2) & n_man(x1))
exists e1 x1 x2 x3.(n_barbecue(x3) & n_pork(x2) & ne_per_men(x1) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_cook(e1))