A cashier at a grocery store.
A cashier is underwater.
He is either at the grocery store or underwater.
exists x1 x2 x3.(a_topic(x1) & at(x1,x2) & n_store(x2) & of(x2,x3) & n_grocery(x3) & n_cashier(x1))
exists p1 x1.(exists x2.((x1 = x2) & n_underwater(x2)) & n_cashier(x1))