A man is drawing on the street while another man videotapes it.
A man is videotaping.
"A man is videotaping" is another way of saying "another man videotapes it."
exists e1 p1 x1 x2.(n_thing(x2) & n_street(x2) & exists e2 x3.(Theme(e2,x2) & Actor(e2,x3) & v_videotape(e2) & n_man(x3) & -(x3 = x1)) & n_man(x1) & n_man(x1) & while(e1,p1) & on(e1,x2) & Actor(e1,x1) & v_draw(e1))
exists e1 x1.(Actor(e1,x1) & v_videotape(e1) & n_man(x1))