There is graffiti all over a yellow cafe express sign.
A yellow cafe sign is covered in graffiti.
Covered in is a rephrasing of all over.
exists p1 s1 s2 x1 x2 x3.(r_all(p1) & over(p1,x2) & n_sign(x2) & a_express(s2) & Theme(s2,x2) & of(x2,x3) & n_cafe(x3) & a_yellow(s1) & Theme(s1,x2) & exists x4.((x1 = x4) & n_graffitus(x4)))
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_graffitus(x3) & Theme(e1,x1) & v_cover(e1) & n_sign(x1) & of(x1,x2) & n_cafe(x2) & a_yellow(s1) & Theme(s1,x1))