A man operating some heavy machinery.
All of the machines are turned off.
A man can be either operating machinery or the machines are turned off.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_operate(e1) & n_machinery(x3) & a_heavy(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists x2.(n_machine(x2) & all x1.(n_thing(x1) -> exists e1 s1.(a_off(s1) & Manner(e1,s1) & Theme(e1,x1) & v_turn(e1) & of(x1,x2))))