A child sings into a loofa in the bathtub
The child is at the park.
One cannot be in a park and bathtub simultaneously.
exists e1 x1 x2 x3.(n_bathtub(x3) & into(e1,x2) & in(x2,x3) & n_loofa(x2) & Actor(e1,x1) & v_sing(e1) & n_child(x1))
exists p1 x1 x2.(n_park(x2) & n_child(x1) & at(x1,x2))