Some construction workers are taking a break.
Construction workers are having lunch.
Not all construction workers taking a break are having lunch.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_take(e1) & n_break(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_lunch(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))