Man with computer giving speech.
The man is using the computer for a PowerPoint presentation.
A computer is not always used to give a PowerPoint presentation.
exists e1 x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_give(e1) & n_speech(x4) & (x2 = x3) & n_computer(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(n_computer(x2) & n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & for(x2,x3) & n_presentation(x3) & of(x3,x4) & n_powerpoint(x4))