Children playing with or cleaning up miscellaneous items.
Adults working in a garden.
The group can't be children and adults at the same time. They can't be playing and working at the same time.
(exists e1 s1 x1 x2.(with(e1,x2) & n_item(x2) & a_miscellaneous(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_child(x1)) | exists e2 s2 s3 x3 x4.(a_up(s3) & Manner(e2,s3) & Theme(e2,x4) & Actor(e2,x3) & v_clean(e2) & n_item(x4) & a_miscellaneous(s2) & Theme(s2,x4) & n_child(x3)))
exists e1 x1 x2.(in(e1,x2) & n_garden(x2) & Actor(e1,x1) & v_work(e1) & n_adult(x1))