A person is jumping at the top of a sand dune.
A person is jumping around in the sand on a nice day.
Just because a person jumps on a sand dune doesn't mean it's a nice day.
exists e1 x1 x2 x3 x4.(n_top(x2) & at(e1,x2) & of(x2,x3) & n_dune(x3) & of(x3,x4) & n_sand(x4) & Actor(e1,x1) & v_jump(e1) & n_person(x1))
exists e1 s1 s2 x1 x2 x3.(n_sand(x2) & on(e1,x3) & n_day(x3) & a_nice(s2) & Theme(s2,x3) & in(e1,x2) & a_around(s1) & Manner(e1,s1) & Actor(e1,x1) & v_jump(e1) & n_person(x1))