Men, women and children dance at a party.
No one who is depicted has ever danced before in their life, not even once.
In sentence one the subjects are dancing, in sentence two the subject has never danced.
exists x1 x2 x3 x4 x5 x6.(a_topic(x1) & rel(x1,x2) & subset_of(x4,x2) & at(x4,x6) & n_party(x6) & n_dance(x4) & of(x4,x5) & n_child(x5) & subset_of(x3,x2) & n_woman(x3) & n_man(x1))
--exists e2 e1 s1 s2 x1 x2 x3 x4.(a_ever(s2) & Manner(e2,s2) & r_even(e2) & card_eq_1(x4) & n_time(x4) & Frequency(e2,x4) & in(e2,x3) & n_life(x3) & of(x3,x1) & n_thing(x1) & a_before(s1) & Manner(e2,s1) & Actor(e2,x1) & v_dance(e2) & Theme(e1,x2) & v_depict(e1) & (x1 = x2) & n_one(x1))