A man is reading something on a computer screen
A man proofreads his work.
man reading something on a computer screen doesn't necessarily mean man proofreading his work.
exists e1 x1 x2 x3 x4.(on(e1,x3) & n_screen(x3) & of(x3,x4) & n_computer(x4) & Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_thing(x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_proofread(e1) & n_work(x2) & of(x2,x1) & n_male(x1) & n_man(x1))