There is a man and woman sitting on stone cylinders with other people walking around.
The two people are waiting for friends.
You can not infer they are waiting for friends.
exists p1 x1 x9.(n_people(x9) & exists e1 e2 s1 x2 x3 x4 x5 x6 x7 x8 x10.((x1 = x2) & with(e1,x8) & a_around(s1) & Manner(e2,s1) & Actor(e2,x10) & v_walk(e2) & (x8 = x10) & -(x8 = x9) & n_people(x8) & on(e1,x6) & n_cylinder(x6) & of(x6,x7) & n_stone(x7) & Actor(e1,x5) & v_sit(e1) & (x2 = x5) & n_woman(x4) & n_man(x3) & subset_of(x4,x2) & subset_of(x3,x2)))
exists e1 x1 x2.(n_people(x1) & card_eq_2(x1) & for(e1,x2) & n_friend(x2) & Actor(e1,x1) & v_wait(e1))