Two Asian factory workers at work.
Two Asian factory workers building iPhones
You can not infer they are making iPhones.
exists s1 x1 x2 x3.(a_topic(x1) & at(x1,x3) & n_work(x3) & n_worker(x1) & of(x1,x2) & n_factory(x2) & a_asian(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_build(e1) & n_iphone(x3) & n_worker(x1) & of(x1,x2) & n_factory(x2) & a_asian(s1) & Theme(s1,x1) & card_eq_2(x1))