The people are sitting and mingling near the tent.
People having lunch at an expensive restaurant
An expensive restaurant is not in or near tents.
exists e2 e1 x1 x2 x3.(n_tent(x3) & n_people(x1) & n_tent(x2) & near(e2,x3) & Actor(e2,x1) & v_mingle(e2) & near(e1,x2) & Actor(e1,x1) & v_sit(e1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x4) & n_restaurant(x4) & a_expensive(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_have(e1) & n_lunch(x3) & (x1 = x2) & n_people(x1))