Many people attending a seminar.
There are humans at an organized event.
a seminar is an organized event.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_attend(e1) & n_seminar(x3) & (x1 = x2) & n_people(x1) & n_quantity(x1))
exists p1 s1 x1 x2.(at(p1,x2) & n_event(x2) & a_organized(s1) & Theme(s1,x2) & exists x3.((x1 = x3) & n_human(x3)))