widening measures with rests

[Ruud van Silfhout]

Hi,

For a piece I am typesetting currently I need to widen a rest to be able
to print the text that belongs to it, above it (see the attached png file).
How can I create this kind of behaviour?

\score {
  \notes \relative c' { 
    \time 4/2 R1*4/2 | 
       R1*4/2\markup { \italic "zum Tempo   a Tempo" } | 
       R1*4/2 | b1..
}
\paper {
}

Thanks,
Ruud

ViolinII.PNG
Description: PNG image