People are talking while standing by a row of motorbikes.
Bikers at a reststop
Not all people are at a reststop.
exists e1 e2 x1 x2 x3.(while(e1,e2) & by(e2,x2) & of(x2,x3) & n_motorbike(x3) & n_row(x2) & Actor(e2,x1) & v_stand(e2) & Actor(e1,x1) & v_talk(e1) & n_people(x1))
exists x1 x2.(a_topic(x1) & at(x1,x2) & n_reststop(x2) & n_biker(x1))