Two guys in blue shirts are standing on top of a construction surface doing construction work.
There are two men wearing blue uniforms who are working atop a house that is being built.
Being on top of a construction surface does not imply it is a house.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8.(on(e1,x3) & of(x3,x4) & Theme(e2,x7) & Actor(e2,x6) & v_do(e2) & n_work(x7) & of(x7,x8) & n_construction(x8) & (x4 = x6) & n_surface(x4) & of(x4,x5) & n_construction(x5) & n_top(x3) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_guy(x1) & card_eq_2(x1))
exists p1 x1 e1 e3 e2 s1 x2 x3 x4 x5 x6 x7.((x1 = x2) & Theme(e3,x4) & Actor(e3,x3) & v_wear(e3) & atop(e1,x6) & Theme(e2,x7) & v_build(e2) & (x6 = x7) & n_house(x6) & Actor(e1,x5) & v_work(e1) & (x4 = x5) & n_uniform(x4) & a_blue(s1) & Theme(s1,x4) & (x2 = x3) & n_man(x2) & card_eq_2(x2))