a man in blue sitting on a machine working.
A person works while sitting on a machine.
A man is a person, and he is sitting on a machine doing work
exists e1 e2 s1 x1 x2 x3 x4.(a_topic(x1) & for(e1,e2) & Actor(e2,x3) & v_work(e2) & on(e1,x4) & n_machine(x4) & Actor(e1,x3) & v_sit(e1) & (x1 = x3) & Theme(s1,x2) & a_blue(s1) & (x1 = x2) & n_man(x1))
exists e2 e1 x1 x2.(while(e1,e2) & on(e2,x2) & n_machine(x2) & Actor(e2,x1) & v_sit(e2) & Actor(e1,x1) & v_work(e1) & n_person(x1))