A mother and her two daughters having a happy moment.
A mother and her daughters are smiling and laughing.
Just because a mother and daughter are having a happy moment does not mean that they are smiling and laughing.  They can be happy with different expression on their faces.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & Theme(e1,x4) & Actor(e1,x3) & v_have(e1) & n_moment(x4) & a_happy(s2) & Theme(s2,x4) & (x2 = x3) & n_daughter(x2) & card_eq_2(x2) & of(x2,x1) & n_female(x1) & subset_of(x1,s1) & n_mother(x1))
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(Actor(e2,x4) & v_laugh(e2) & subset_of(x7,x4) & n_daughter(x7) & of(x7,x6) & n_female(x6) & subset_of(x5,x4) & n_mother(x5) & Actor(e1,x1) & v_smile(e1) & subset_of(x3,x1) & n_daughter(x3) & of(x3,x2) & n_female(x2) & subset_of(x2,x1) & n_mother(x2))