A young boy rides a horse in the rain forest.
The young boy is looking for a rare type of plant to make medicine for his father.
If the boy is looking for a rare type of plant, he wouldn't be riding a horse as a horse is a large animal and might unknowingly step on the rare plant.
exists e1 s1 x1 x2 x3 x4.(n_forest(x3) & of(x3,x4) & n_rain(x4) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & in(x2,x3) & n_horse(x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 p1 s1 s2 x1 x2 x3 x5.(n_father(x5) & of(x5,x1) & n_male(x1) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & for(e1,x2) & Topic(x2,p1) & exists e2 x4.(for(e2,x5) & Theme(e2,x4) & Actor(e2,x2) & v_make(e2) & n_medicine(x4)) & of(x2,x3) & n_plant(x3) & n_type(x2) & a_rare(s2) & Theme(s2,x2) & Actor(e1,x1) & v_look(e1))