Sankey Diagram

A basic Sankey diagram which I want to be clickable. Slightly modified version of the example found here - https://developers.google.com/chart/interactive/docs/gallery/sankey.

by ystasyuk

HTML

<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<div id="sankey_basic" style="width: 900px; height: 300px;"></div>

JavaScript

google.load('visualization', '1.1', {
  packages: ['sankey']
});
google.setOnLoadCallback(drawChart);

function drawChart() {
  var data = new google.visualization.DataTable();
  data.addColumn('string', 'From');
  data.addColumn('string', 'To');
  data.addColumn('number', 'Weight');
  data.addRows([

    ['Research 2007', 'Reader Services 2008', 1],
    ['Research 2007', 'Stack Maintenance & Circulation 2008', 1],
    ['Research 2007', 'Special Projects Team 2008', 1],
    ['Research 2007', 'Photo Services & Permissions 2008', 1],
    ['Research 2007', 'AskNYPL 2008', 1],
    ['Research 2007', 'General Collections 2008', 1],

    ['Digital Library Program 2007', 'Digital Imaging Unit 2008', 1],
    ['Digital Library Program 2007', 'NYPL Labs 2008', 1],
    
    ['General Collections 2008','Library Sites & Services 2008', 1],
    ['Library Sites & Services 2008', 'Library Services 2014', 1],

   
    ['Reader Services 2008','RRS 2008', 1],
    
    ['Stack Maintenance & Circulation 2008','RRS 2008', 1],
    ['Special Projects Team 2008','RRS 2008', 1],
    ['Photo Services & Permissions 2008','RRS 2008', 1],
    ['AskNYPL 2008','RRS 2008', 1],
    ['Digital Imaging Unit 2008','RRS 2008', 1],
    ['NYPL Labs 2008','RRS 2008', 1],
    
    
    ['RRS 2008', 'Stack Maintenance & Circulation 2011', 1],
    ['RRS 2008', 'Special Projects Team 2011', 1],
    ['RRS 2008', 'Photo Services & Permissions 2014', 1],
    ['RRS 2008', 'AskNYPL 2014', 1],
    ['RRS 2008', 'Digital Imaging Unit 2014', 1],
    ['RRS 2008', 'NYPL Labs 2014', 1],


    ['Digital Imaging Unit 2014', 'NYPL Library & Labs 2014', 1],
    ['Photo Services & Permissions 2014', 'NYPL Library & Labs 2014', 1],
    ['NYPL Labs 2014', 'NYPL Library & Labs 2014', 1],

    ['Research TS 2007', 'CCO 2008', 1],
    ['Research TS 2007', 'CCO 2008', 1],
    ['CCO 2008', 'BookOps 2013', 2]


  ]);

  // Sets chart options.
  var options = {
    width: 1200,
    sankey: { node: { nodePadding: 500 } },
    
 ...