A man appears to be sleeping in a warehouse of chickens.
There is nobody in the warehouse.
When nobody is there then the man cannot be sleeping in the warehouse
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_appear(e1) & exists e2 x2 x3.(in(e2,x2) & of(x2,x3) & n_chicken(x3) & n_warehouse(x2) & Actor(e2,x1) & v_sleep(e2)) & n_man(x1))
exists p1 x1 x3.(n_warehouse(x3) & -exists x2.((x1 = x2) & in(x2,x3) & n_person(x2)))