Two dogs play together in the yard.
Two dogs are pulling a sled.
Dogs playing together aren't doing work like pulling a sled.
exists e1 s1 x1 x2.(n_yard(x2) & in(e1,x2) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_pull(e1) & n_sled(x2) & n_dog(x1) & card_eq_2(x1))