Two men sitting outside are deep in conversation.
Some people are sitting on a bench.
Just because they are deep in conversation outside, doesn't automatically imply that they are sitting on a bench.  They could be sitting elsewhere, or even standing.
exists e1 s1 s2 x1 x2 x3.(in(s2,x3) & n_conversation(x3) & Theme(s2,x1) & a_deep(s2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_bench(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))