How do you add this staff group bracket?

[Reggie]

Hi. I tried to look here and attempt adding delimiter code but no matter what
I do I cannot show a brace or bracket or anything to put my two oboes
together for the duration of the 2 staves on a few pages. Then it should go
back to normal grouping in code. Can you please tell me how I am wrong? How
can I have a brace grouping for my oboes but then go back to normal right
after the end of the two?
http://lilypond.org/doc/v2.19/Documentation/notation/displaying-staves#grouping-staves

Here is my code it compiles sorry I didn't make it only 3 lines long. Thank
you for helping.
how_to_brace.png
<http://lilypond.1069038.n5.nabble.com/file/t5625/how_to_brace.png>  

\version "2.19.82"
\language "english"

#(set-global-staff-size 20)

global = {

}

scoreAFluteI = \relative c'' {
  \global
  % Music follows here.
  \repeat unfold 100 {c1}
}

scoreAFluteII = \relative c'' {
  \global
  % Music follows here.
  \repeat unfold 100 {c1}
}

scoreAOboe = \relative c'' {
  \global
  % Music follows here.
  \repeat unfold 20 {c1}
  <<

    \new Staff \with {
      alignAboveContext = #"mainoboe"
      shortInstrumentName = "Solo Ob."
    } { \break fs fs1 f f f f f f f f f f f f \break }  {

      \repeat unfold 50 {f,16 e d8 r f16 e d8  e f16 g a8 }
    }
  >>


}

scoreABassoon = \relative c {
  \global
  % Music follows here.
  \repeat unfold 100 {c1}
}

scoreATrumpetC = \relative c'' {
  \global
  % Music follows here.
  \repeat unfold 100 {c1}
}

scoreATrombone = \relative c {
  \global
  % Music follows here.
  \repeat unfold 100 {c1}
}

scoreAViolinI = \relative c'' {
  \global
  % Music follows here.
  \repeat unfold 50 {c2(:32 ef2):32 }
}

scoreAViolinII = \relative c'' {
  \global
  % Music follows here.
  \repeat unfold 50 {c2(:32 ef2):32 }
}

scoreAViola = \relative c' {
  \global
  % Music follows here.
  \repeat unfold 50 {c2(:32 ef2):32 }
}

scoreACello = \relative c {
  \global
  % Music follows here.
  \repeat unfold 50 {c2(:32 ef2):32 }
}

scoreAContrabass = \relative c {
  \global
  % Music follows here.
  \repeat unfold 50 {c2(:32 ef2):32 }
}

scoreAFluteIPart = \new Staff \with {
  instrumentName = "Flute I"
  shortInstrumentName = "Fl. I"
} \scoreAFluteI

scoreAFluteIIPart = \new Staff \with {
  instrumentName = "Flute II"
  shortInstrumentName = "Fl. II"
} \scoreAFluteII

scoreAOboePart = \new Staff = "mainoboe" \with {
  instrumentName = "Oboe"
  shortInstrumentName = "Ob."
} \scoreAOboe

scoreABassoonPart = \new Staff \with {
  instrumentName = "Bassoon"
  shortInstrumentName = "Bn."
} { \clef bass \scoreABassoon }

scoreATrumpetCPart = \new Staff \with {
  instrumentName = "Trumpet in C"
  shortInstrumentName = "Tr.C."
} \scoreATrumpetC

scoreATrombonePart = \new Staff \with {
  instrumentName = "Trombone"
  shortInstrumentName = "Trb."
} { \clef bass \scoreATrombone }

scoreAViolinIPart = \new Staff \with {
  instrumentName = "Violin I"
  shortInstrumentName = "Vl. I"
} \scoreAViolinI

scoreAViolinIIPart = \new Staff \with {
  instrumentName = "Violin II"
  shortInstrumentName = "Vl. II"
} \scoreAViolinII

scoreAViolaPart = \new Staff \with {
  instrumentName = "Viola"
  shortInstrumentName = "Vla."
} { \clef alto \scoreAViola }

scoreACelloPart = \new Staff \with {
  instrumentName = "Cello"
  shortInstrumentName = "Cl."
} { \clef bass \scoreACello }

scoreAContrabassPart = \new Staff \with {
  instrumentName = "Contrabass"
  shortInstrumentName = "Cb."
} { \clef bass \scoreAContrabass }

\score {
  <<
    \new StaffGroup <<
      \scoreAFluteIPart
      \scoreAFluteIIPart
      \scoreAOboePart
      \scoreABassoonPart
    >>
    \new StaffGroup <<
      \scoreATrumpetCPart
      \scoreATrombonePart
    >>
    \new StaffGroup <<
      \scoreAViolinIPart
      \scoreAViolinIIPart
      \scoreAViolaPart
      \scoreACelloPart
      \scoreAContrabassPart
    >>
  >>
  \layout { }
}

\paper {
  right-margin = 7\mm
  left-margin = 21\mm

}



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