Two children are petting a calf.
Two children pet an animal
a calf is an animal.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_pet(e1) & n_calf(x2) & n_child(x1) & card_eq_2(x1))
exists s1 x1 x2 x3.(a_topic(x1) & Theme(s1,x3) & Actor(s1,x2) & a_pet(s1) & n_animal(x3) & (x1 = x2) & n_child(x1) & card_eq_2(x1))