A group of people working on computers while wearing headsets.
A dozen people wear headphones while looking at their computers.
A dozen people implies a group of people and working and looking at computers wearing headsets are the same.
exists e1 e2 x1 x2 x3 x4 x5.(a_topic(x1) & while(e1,e2) & Theme(e2,x5) & Actor(e2,x3) & v_wear(e2) & n_headset(x5) & on(e1,x4) & n_computer(x4) & Actor(e1,x3) & v_work(e1) & (x1 = x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 e2 x1 x2 x3 x4.(while(e1,e2) & at(e2,x4) & n_computer(x4) & of(x4,x1) & n_thing(x1) & Actor(e2,x1) & v_look(e2) & Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_headphone(x3) & n_people(x1) & of(x1,x2) & n_dozen(x2))