Workers are at work under scaffolding.
men at work under the dangerous scaffolding
The workers do not have to be men and the scaffolding doesn't have to be dangerous.
exists p1 x1.(exists x2 x3.(at(x1,x2) & under(x2,x3) & n_scaffolding(x3) & n_work(x2)) & n_worker(x1))
exists s1 x1 x2 x3.(n_scaffolding(x3) & a_dangerous(s1) & Theme(s1,x3) & a_topic(x1) & under(x1,x3) & at(x1,x2) & n_work(x2) & n_man(x1))