google charts timelines without row label tutorial

Code

<html>
<head>
<title>Google Charts tutorial Tutorial - Wikitechy</title>
   <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
   <script type="text/javascript" src="https://www.google.com/jsapi"></script>
   <script type="text/javascript">
     google.charts.load('current', {packages: ['timeline']});     
   </script>
</head>
<body>
<div id="container" style="width: 650px; height: 500px; margin: 0 auto"></div>
<script language="JavaScript">
function drawChart() {
   // Define the chart to be drawn.
   var data = new google.visualization.DataTable();
   data.addColumn({ type: 'string', id: 'President' });
   data.addColumn({ type: 'date', id: 'Start' });
   data.addColumn({ type: 'date', id: 'End' });
   data.addRows([
      [ 'Arnold', new Date(1689, 3, 30), new Date(1697, 2, 4) ],
      [ 'James',      new Date(1697, 2, 4),  new Date(1701, 2, 4) ],
      [ 'Vincent',  new Date(1701, 2, 4),  new Date(1709, 2, 4) ]]);

var options = {      
      width: '50%', 
	  height: '50%',
      timeline: { showRowLabels: false }
   };
		
   // Instantiate and draw the chart.
   var chart = new google.visualization.Timeline(document.getElementById('container'));
   chart.draw(data, options);
}
google.charts.setOnLoadCallback(drawChart);
</script>
</body>
</html>

Result