A man with a beer sits alone at a table.
Nobody is sitting.
one is about a man while the other is about nobody
exists e1 s1 x1 x2 x3.(at(e1,x3) & n_table(x3) & a_alone(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & with(x1,x2) & n_beer(x2) & n_man(x1))
-exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_person(x1))