People hanging about in a crowded cafe.
The people are all adults.
people hanging around the cafe does not imply the people are adults
exists e1 s1 x1 x2 x3.(a_topic(x1) & r_about(e1) & in(e1,x3) & n_cafe(x3) & a_crowded(s1) & Theme(s1,x3) & Actor(e1,x2) & v_hang(e1) & (x1 = x2) & n_people(x1))
exists p1 x1.(n_people(x1) & all x2.(n_adult(x2) -> (x1 = x2)))