Two construction workers wearing yellow rubber boots are sitting next to some pipes.
Somebody in the frame has footwear on their feet.
The construction workers wearing boots must be the people in the frame that have footwear.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(to(e2,x6) & n_pipe(x6) & r_next(e2) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_boot(x4) & of(x4,x5) & n_rubber(x5) & a_yellow(s1) & Theme(s1,x4) & (x1 = x3) & n_worker(x1) & of(x1,x2) & n_construction(x2) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(n_foot(x4) & of(x4,x2) & n_thing(x2) & n_frame(x2) & in(x1,x2) & on(e1,x4) & Actor(e1,x3) & v_footwear(e1) & (x2 = x3) & r_somebody(x1) & n_event(x1))