A lady and man on stage acting.
A old lady and man on stage
Sentence 1 is missing an old lady
exists s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & on(x2,x3) & n_acting(x3) & of(x3,x4) & n_stage(x4) & n_man(x2) & subset_of(x1,s1) & n_lady(x1))
exists s1 s2 x1 x2 x3.(a_topic(s1) & on(s1,x3) & n_stage(x3) & n_man(x2) & n_lady(x1) & subset_of(x2,s1) & subset_of(x1,s1) & a_old(s2) & Theme(s2,s1))