Workers at an International Freestyle Motocross press conference.
the workers were at a conference
if the workers are at a press conference then the workers are at a conference.
exists x1 x2 x3 x4 x5 x6.(a_topic(x1) & at(x1,x2) & n_conference(x2) & of(x2,x6) & n_press(x6) & (x2 = x5) & ne_org_motocross(x5) & (x2 = x4) & ne_org_freestyle(x4) & (x2 = x3) & ne_org_international(x3) & n_worker(x1))
exists p1 x1.(n_worker(x1) & exists x2.(at(x1,x2) & n_conference(x2)))