Children at maybe, at their School, or maybe, a Field trip.
Children are involved in an educational activity.
if they are at school or a field trip, it would be an educational activity.
exists x1 x2 x3.(((a_topic(x1) & at(x1,x2) & at(x2,x3)) | exists x4 x5 x6 x7.(a_topic(x1) & at(x1,x2) & at(x2,x4) & subset_of(x6,x4) & n_trip(x6) & of(x6,x7) & n_field(x7) & subset_of(x5,x4) & n_maybe(x5))) & n_school(x3) & of(x3,x1) & n_thing(x1) & n_maybe(x2) & n_child(x1))
exists e1 s1 x1 x2.(in(e1,x2) & n_activity(x2) & a_educational(s1) & Theme(s1,x2) & Theme(e1,x1) & v_involve(e1) & n_child(x1))