\version "2.18.2"

title-left = "Example: Split"
title-right = "Centered Title"
em-dash = \markup \char ##x2014

\header {
  title = \markup { \fontsize #2 \bold { \title-left \title-right } }
  poet = "poet"
  composer = "composer"
}

\paper {
  print-page-number = ##t
  print-first-page-number = ##f
  oddHeaderMarkup = \markup {
    \on-the-fly #print-page-number-check-first
    \fill-line {
      \fromproperty #'header:poet
      \line { 
        \title-left
        \em-dash
        \fromproperty #'page:page-number-string
        \em-dash
        \title-right
      }
      \fromproperty #'header:composer
    }
  }
  evenHeaderMarkup = \oddHeaderMarkup
}

\book {
  \score {
    \new Staff {
      \relative c' { c1 \pageBreak c }
    }
  }
}