A man is a white shirt sits under a lamp typing on a laptop computer.
A man is typing his autobiography on his computer.
Because a man is typing doesn't mean he is working on writing an autobiography.
exists e2 e1 p1 s1 x1 x2 x3 x4.(for(e1,e2) & on(e2,x4) & n_computer(x4) & a_laptop(s1) & Theme(s1,x4) & Actor(e2,x1) & v_type(e2) & under(e1,x3) & n_lamp(x3) & Actor(e1,x1) & v_sit(e1) & exists s2 x5.((x2 = x5) & n_shirt(x5) & a_white(s2) & Theme(s2,x5)) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(on(e1,x3) & n_computer(x3) & of(x3,x1) & n_male(x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_type(e1) & n_autobiography(x2) & of(x2,x1) & n_man(x1))