A group of young men are playing around a natural waterfall.
A group of young men around a waterfall before a party later.
Just because the group of young men are playing around a waterfall, one can not assume they are doing this before a party later.
exists e1 s1 s2 x1 x2 x3.(around(e1,x3) & n_waterfall(x3) & a_natural(s2) & Theme(s2,x3) & Actor(e1,x1) & v_play(e1) & of(x1,x2) & n_man(x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))
exists s1 x1 x2 x3 x4.(a_topic(x1) & r_later(x1) & of(x1,x2) & around(x2,x3) & before(x3,x4) & n_party(x4) & n_waterfall(x3) & n_man(x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))