A worker in a hard hat and orange vest is working.
The work required a hard hat be worn while working on the job.
Both worker are wearing a hard hat while working on the job.
exists e1 s1 x1 x2 x3 x4 x5.(Actor(e1,x1) & v_work(e1) & in(x1,x2) & n_vest(x4) & of(x4,x5) & n_orange(x5) & n_hat(x3) & a_hard(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_worker(x1))
exists e3 e1 e2 s1 x1 x2 x3 x4.(n_job(x4) & n_work(x1) & while(e2,e3) & on(e3,x4) & Actor(e3,x1) & v_work(e3) & Theme(e2,x1) & v_wear(e2) & Theme(e1,x3) & Actor(e1,x2) & v_require(e1) & n_hat(x3) & a_hard(s1) & Theme(s1,x3) & (x1 = x2))