Two people are sitting on a wooden structure near a tree while conversing.
Two people sitting are friends.
If people are sitting together, that does not necessarily mean they are friends.
exists e2 e1 s1 x1 x2 x3.(while(e1,e2) & Actor(e2,x1) & v_converse(e2) & on(e1,x2) & near(x2,x3) & n_tree(x3) & n_structure(x2) & a_wooden(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_2(x1))
exists e1 p1 x1 x2.(exists x3.((x1 = x3) & n_friend(x3)) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))