Four swimmers in the crystal blue ocean with yellow surfboards.
The people sit on the beach and watch the whales swim by.
You cannot swim in the ocean and sit on the beach at the same time.
exists s1 s2 s3 x1 x2 x3.(n_ocean(x2) & a_blue(s2) & Theme(s2,x2) & a_crystal(s1) & Theme(s1,x2) & a_topic(x1) & in(x1,x2) & with(x2,x3) & n_surfboard(x3) & a_yellow(s3) & Theme(s3,x3) & n_swimmer(x1) & card_eq_4(x1))
exists e3 e1 e2 s1 x1 x2 x3 x4.(n_whale(x3) & n_people(x1) & n_beach(x2) & Theme(e3,x3) & Actor(e3,x1) & v_watch(e3) & a_by(s1) & Manner(e2,s1) & Theme(e2,x4) & v_swim(e2) & (x3 = x4) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))