A child with a orange backpack is carrying a green bird house.
A child is sitting inside.
One can not be sitting inside and carrying a bird house simultaneously.
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x4) & Actor(e1,x1) & v_carry(e1) & n_house(x4) & of(x4,x5) & n_bird(x5) & a_green(s1) & Theme(s1,x4) & with(x1,x2) & n_backpack(x2) & of(x2,x3) & n_orange(x3) & n_child(x1))
exists e1 s1 x1.(a_inside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_child(x1))