\paper { tagline = ##f }

\layout {
  \context {
    \Staff
    \consists Measure_spanner_engraver
  }
}

<<
  \new Staff \relative c'' {
    \key d \minor
    R1*2
    \tweak text "Answer"
    \startMeasureSpanner
    \tuplet 3/2 8 {
      a16[ b c] d[ c b]  c[ d e] f[ e d]
    }
    e8 a gis g
    fis f e d~ d c b e
    \stopMeasureSpanner
  }
  \new Staff \relative c' {
    \key d \minor
    \tweak text "Subject"
    \tweak direction #DOWN
    \startMeasureSpanner
    \tuplet 3/2 8 {
      d16[ e f] g[ f e] f[ g a] bes[ a g]
    }
    a8 d cis c
    b bes a g~ g f e a
    \stopMeasureSpanner
    \tweak text "Counter-subject"
    \tweak direction #DOWN
    \startMeasureSpanner
    f8 e a r r16 b, c d e fis g e
    a gis a b c fis, b a gis e a4 g8
    \stopMeasureSpanner
  }
>>