BSR trucks and machinery and workers.
Workers and machinery.
machinery and workers can also be said as  Workers and machinery.
exists s1 s2 x1 x2 x3 x4 x5.(n_worker(x2) & a_.(s2) & Theme(s2,x2) & n_machinery(x4) & n_truck(x3) & (x3 = x5) & ne_org_bsr(x5) & subset_of(x4,x1) & subset_of(x3,x1) & subset_of(x2,s1) & subset_of(x1,s1) & a_topic(s1))
exists s1 s2 x1 x2.(n_machinery(x2) & a_.(s2) & Theme(s2,x2) & n_worker(x1) & subset_of(x2,s1) & subset_of(x1,s1) & a_topic(s1))