A couple and their child are playing on the beach next to the ocean.
The family is building a sand castle.
Sentence 1 is missing building a sand castle
exists e1 x1 x2 x3 x4 x5 x6.(n_ocean(x6) & n_beach(x4) & on(e1,x4) & to(x5,x6) & next(x4,x5) & n_thing(x5) & Actor(e1,x1) & v_play(e1) & subset_of(x3,x1) & n_child(x3) & of(x3,x2) & n_thing(x2) & subset_of(x2,x1) & n_couple(x2))
exists e1 x1 x2 x3.(n_family(x1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_castle(x2) & of(x2,x3) & n_sand(x3))