LMX:
measure key:fifths:-6 clef:F4 staff:1 clef:F4 staff:2 rest voice:1 rest:measure staff:1 backup whole rest voice:5 rest:measure staff:2 measure time beats:3 beat-type:4 rest voice:1 rest:measure staff:1 backup half backup quarter rest voice:5 rest:measure staff:2


MusicXML:
<?xml version='1.0' encoding='utf-8'?>
<score-partwise version="3.1"><part-list><score-part id="P2"><part-name>Piano</part-name></score-part></part-list><part id="P2"><measure number="53" width="680.51">
      <print>
        <staff-layout number="1">
          <staff-distance>71.17</staff-distance>
          </staff-layout>
        <staff-layout number="2">
          <staff-distance>85.00</staff-distance>
          </staff-layout>
        </print>
      <attributes><divisions>12</divisions>
        <key>
          <fifths>-6</fifths>
          </key>
        <staves>2</staves>
        <clef number="1">
          <sign>F</sign>
          <line>4</line>
          </clef>
        <clef number="2">
          <sign>F</sign>
          <line>4</line>
          </clef>
        </attributes><note>
        <rest measure="yes" />
        <duration>48</duration>
        <voice>1</voice>
        <staff>1</staff>
        </note>
      <backup>
        <duration>48</duration>
        </backup>
      <note>
        <rest measure="yes" />
        <duration>48</duration>
        <voice>5</voice>
        <staff>2</staff>
        </note>
      <barline location="right">
        <bar-style>light-light</bar-style>
        </barline>
      </measure>
    <measure number="54" width="525.11">
      <attributes>
        <time>
          <beats>3</beats>
          <beat-type>4</beat-type>
          </time>
        </attributes>
      <note>
        <rest measure="yes" />
        <duration>36</duration>
        <voice>1</voice>
        <staff>1</staff>
        </note>
      <backup>
        <duration>36</duration>
        </backup>
      <note>
        <rest measure="yes" />
        <duration>36</duration>
        <voice>5</voice>
        <staff>2</staff>
        </note>
      <barline location="right">
        <bar-style>light-light</bar-style>
        </barline>
      </measure>
    </part></score-partwise>