positioning a rest

[Patrick Karl]

I'm trying to duplicate the following measure:



My attempt:

\version "2.19.32"
{
    \new Staff <<
        \time 3/4
        \new Voice { \oneVoice r4 r \voiceOne g' }
        \new Voice { \voiceTwo s4 c'2 }
    >>
}

This works fine for everything but the second quarter-rest, which is positioned beneath the half-note middle-C:



I've tried several variations of the above snippet, but the rest either move up to  the \voiceOne position or remains firmly beneath the middle-C.  How can I get the second rest to be positioned in the middle of the staff, at the same level as the first rest?

Thanks.
Pat