People jumping in sacks in a grassy area with trees.
People are outside.
People are doing exercise like jumping on the grassy area outside.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x3) & with(x3,x5) & n_tree(x5) & in(x3,x4) & n_area(x4) & a_grassy(s1) & Theme(s1,x4) & n_sack(x3) & Actor(e1,x2) & v_jump(e1) & (x1 = x2) & n_people(x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_people(x1))