A man looking through a microscope while working on a circuit board.
The man is blind
One can not be looking and be blind simultaneously.
exists e2 e1 x1 x2 x3 x4 x5.(a_topic(x1) & while(e1,e2) & on(e2,x4) & n_board(x4) & of(x4,x5) & n_circuit(x5) & Actor(e2,x2) & v_work(e2) & through(e1,x3) & n_microscope(x3) & Actor(e1,x2) & v_look(e1) & (x1 = x2) & n_man(x1))
exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_blind(s1))