Two dogs playing in the snow.
the dogs have never seen snow before
Sentence 1 is missing dogs never seen snow before
exists e1 x1 x2 x3.(n_snow(x3) & a_topic(x1) & in(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))
exists e1 s1 s2 x1 x2.(n_dog(x1) & a_never(s2) & Manner(e1,s2) & a_before(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_see(e1) & n_snow(x2))