Two men kayaking in rough waters.
A father and son go kayaking
The two men are not necessarily father and son.
exists e1 s1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_waters(x3) & a_rough(s1) & Theme(s1,x3) & Actor(e1,x2) & v_kayake(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 p1 x1 x2 x3.(exists e2.(Actor(e2,x1) & v_kayake(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_go(e1) & n_son(x3) & n_father(x2) & subset_of(x3,x1) & subset_of(x2,x1))