Three women wearing white gowns are dancing.
Three friends decided to have a joint marriage.
Sentence 2 explains why the three woman are wearing white gowns and that they are friends having a joint marriage.
exists e1 e2 s1 x1 x2 x3.(Actor(e2,x1) & v_dance(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_gown(x3) & a_white(s1) & Theme(s1,x3) & (x1 = x2) & n_woman(x1) & card_eq_3(x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_decide(e1) & exists e2 s1 x2.(Theme(e2,x2) & Actor(e2,x1) & v_have(e2) & n_marriage(x2) & a_joint(s1) & Theme(s1,x2)) & n_friend(x1) & card_eq_3(x1))