A man sits at a table.
A man is sitting at a table in his kitchen.
The table is not necessarily in the kitchen.
exists e1 x1 x2.(at(e1,x2) & n_table(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3.(at(e1,x2) & in(x2,x3) & n_kitchen(x3) & of(x3,x1) & n_male(x1) & n_table(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))