Two people are having a conversation, while sitting on a curb.
Dinosaurs having a conversation standing.
There are either people or dinosaurs. They are either sitting or standing.
exists e1 e2 x1 x2 x3.(while(e1,e2) & on(e2,x3) & n_curb(x3) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_conversation(x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_have(e1) & n_standing(x3) & of(x3,x4) & n_conversation(x4) & (x1 = x2) & n_dinosaur(x1))