A man makes a video while another watches.
Two professional documentary makers are working on a project.
Not all men are professional documentary makers.
exists e1 x1 x2 x3 x4.(n_watch(x3) & while(e1,x4) & n_watch(x4) & -(x4 = x3) & Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_video(x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_project(x3) & Actor(e1,x1) & v_work(e1) & n_maker(x1) & of(x1,x2) & n_documentary(x2) & a_professional(s1) & Theme(s1,x1) & card_eq_2(x1))