A black dog is standing on the grass.
A pet is visiting the vet office.
A pet is either standing on the grass or visiting the vet office.
exists e1 s1 x1 x2.(n_grass(x2) & on(e1,x2) & Actor(e1,x1) & v_stand(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_office(x2) & of(x2,x3) & n_vet(x3) & Theme(e1,x2) & Actor(e1,x1) & v_visit(e1) & n_pet(x1))