a group of children are standing outside a building.
Some children are standing outdoors.
Some children could be used collectively to indicate a group of children. Outdoors and outside are synonymous.
exists e1 x1 x2 x3.(outside(e1,x3) & n_building(x3) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_child(x2) & n_group(x1))
exists e1 x1 x2.(Time(e1,x2) & n_outdoors(x2) & Actor(e1,x1) & v_stand(e1) & n_child(x1))