A worker wearing a bright vest and black clothes is picking up trash on the ground while people cross the street behind him.
The worker is next to the street.
Since people cross the street behind him, the person must be next to the street.
exists e1 e2 p1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x9.(n_male(x7) & n_street(x9) & n_ground(x7) & exists e3 x8.(behind(e3,x7) & Theme(e3,x9) & Actor(e3,x8) & v_cross(e3) & n_people(x8)) & while(e2,p1) & on(e2,x7) & a_up(s3) & Manner(e2,s3) & Theme(e2,x6) & Actor(e2,x1) & v_pick(e2) & n_trash(x6) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & subset_of(x5,x3) & n_clothes(x5) & a_black(s2) & Theme(s2,x5) & subset_of(x4,x3) & n_vest(x4) & a_bright(s1) & Theme(s1,x4) & (x1 = x2) & n_worker(x1))
exists s1 x1 x2.(n_street(x2) & n_worker(x1) & to(s1,x2) & Theme(s1,x1) & a_next(s1))