Two workers in uniform are standing next to some heavy machinery.
The workers guide the machine operator.
Just because workers are standing next to heavy machinery it does not mean the workers guide the machine operator.
exists e1 s1 x1 x2 x3.(to(e1,x3) & n_machinery(x3) & a_heavy(s1) & Theme(s1,x3) & r_next(e1) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_uniform(x2) & n_worker(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_operator(x2) & of(x2,x3) & n_machine(x3) & n_worker(x1) & Theme(e1,x2) & Actor(e1,x1) & v_guide(e1))