The children played on the four wheeler in the field.
Children were taking turns learning how to drive a four wheeler.
children playing on the four wheeler in the field does not indicate that they were taking turns learning how to drive a four wheeler.
exists e1 x1 x2 x3.(n_field(x3) & n_wheeler(x2) & card_eq_4(x2) & n_child(x1) & on(e1,x2) & in(x2,x3) & Actor(e1,x1) & v_play(e1))
exists e1 e2 x1 x2 x3.(for(e1,e2) & Topic(e2,x3) & Actor(e2,x1) & v_learn(e2) & n_manner(x3) & exists e3 x4 x5.(Theme(e3,x5) & Actor(e3,x4) & v_drive(e3) & n_wheeler(x5) & card_eq_4(x5)) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_turn(x2) & n_child(x1))