Workers are at work under scaffolding.
Working under extreme conditions
Working under scaffolding is not extreme conditions.
exists p1 x1.(exists x2 x3.(at(x1,x2) & under(x2,x3) & n_scaffolding(x3) & n_work(x2)) & n_worker(x1))
exists s1 s2 x1.(ne_nam_working(s1) & a_topic(s1) & under(s1,x1) & n_condition(x1) & a_extreme(s2) & Theme(s2,x1))