Construction worker in a hard hat and yellow neon vest, working on stairs.
Working on the building is a worker wearing safety gear.
Just because a construction worker in a hard hat and yellow neon vest is working on stairs doesn't imply that he is wearing safety gears.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(a_topic(s1) & subset_of(x4,s1) & on(e1,x7) & n_stair(x7) & Actor(e1,x6) & v_work(e1) & (x4 = x6) & n_vest(x4) & of(x4,x5) & n_neon(x5) & a_yellow(s3) & Theme(s3,x4) & subset_of(x1,s1) & in(x1,x3) & n_hat(x3) & a_hard(s2) & Theme(s2,x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists p1 x1 x2.(n_building(x2) & ne_nam_working(x1) & exists e1 x3 x4 x5 x6.((x1 = x3) & Theme(e1,x5) & Actor(e1,x4) & v_wear(e1) & n_gear(x5) & of(x5,x6) & n_safety(x6) & (x3 = x4) & n_worker(x3)) & on(x1,x2))