Children are learning about a firetruck.
The children are driving the firetruck.
The children are either learning about a firetruck as they cannot be old enough to drive a firetruck.
exists e1 x1 x2.(about(e1,x2) & n_firetruck(x2) & Actor(e1,x1) & v_learn(e1) & n_child(x1))
exists e1 x1 x2.(n_firetruck(x2) & n_child(x1) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1))