A man and woman are on a gray and white rowboat.
2 people sit on a jetski
Not all rowboats are a jetski
exists p1 x1 x2 x3.(exists s1 s2 x4.(on(x1,x4) & n_rowboat(x4) & a_white(s2) & Theme(s2,x4) & a_gray(s1) & Theme(s1,x4)) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists e1 x1 x2.(on(e1,x2) & n_jetskus(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & n_date(x1) & a_date_day_02(x1) & a_date_day_02(x1))