A man controls a large equipment board.
A person operates a sound board.
Not all man controls a large equipment board operates a sound board.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_control(e1) & n_board(x2) & of(x2,x3) & n_equipment(x3) & a_large(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & n_board(x2) & a_sound(s1) & Theme(s1,x2) & n_person(x1))