title: GeoChart with react-google-charts doesn't work
body: <p>what I wanted to do is just displaying a simple map using GeoChart in react-google-charts. This code seems to correct but when I run this code, an error message appears like:</p>
  
  <p><strong>Incompatible data table: Error: Table contains more columns than expected (Expecting 2 columns)</strong></p>
  
  <p>Also when I set the data table to have only one row(commented out), it works without error. But it also doesn't show any data on the map. I have no idea how to use GeoChart with React. Could anyone show me a proper usage?</p>
  
  <p>Here is my code:</p>
  
  <pre><code>import React, { Component } from 'react';
  import { createContainer } from 'meteor/react-meteor-data';
  import { Questions } from '../../api/questions.js';
  import ReactDOM from 'react-dom';
  import { Chart } from 'react-google-charts';
  
  export default class MapContainer extends React.Component{
    render(){
  
          var options = {
            displayMode: 'text'
          };
  
          var data = [[
            ['Germany',202],
            ['France', 600],
            ['Russia', 700],
          ]];
  /*
          var data = [[
            ['Russia', 700],
          ]];
  */
          var columns = [{
                'type': 'string',
                'label' : 'Country'
          },
          {
                'type' : 'number',
                'label' : 'Number'
          }];
  
      return(
        &lt;div className="mapcontainer"&gt;
          &lt;Chart chartType="GeoChart"
                     width={"900px"}
                     height={"500px"}
                     data={data}
                     columns={columns}
                     options={options}
                     graph_id="GeoChart"
                     legend_toggle={true}/&gt;
        &lt;/div&gt;
      );
    }
  }
  </code></pre>