Children are learning about a firetruck.
The children are on a field trip.
Although the children are learning about a fire truck, it cannot be assumed that the children are on a field trip.
exists e1 x1 x2.(about(e1,x2) & n_firetruck(x2) & Actor(e1,x1) & v_learn(e1) & n_child(x1))
exists p1 x1.(n_child(x1) & exists x2 x3.(on(x1,x2) & n_trip(x2) & of(x2,x3) & n_field(x3)))