Sorry, sort of OT, some folks may have some idea.
code below.
<html>
  <head>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">
      google.charts.load('current', {packages:['wordtree']});
      google.charts.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable(
          [ ['Phrases'],
            ['information technology'],
            ['web'],
            ['development']
          ]
        );
        var options = {
          wordtree: {
            format: 'implicit',
           // word: ''
          }
        };
        var chart = new google.visualization.WordTree(document.getElementById('wordtree_basic'));
        chart.draw(data, options);
      }
    </script>
  </head>
  <body>
    <div id="wordtree_basic" style="width: 900px; height: 500px;"></div>
  </body>
</html>
issue: expected three items to be rendered, however, we now have four including an erroneous “technology” while view source indicates correct rendering.
tested browser; firefox and chrome.