How to create two x-axes label using chart.js?

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var ctx = document.getElementById('myChart').getContext('2d');

var chart = new Chart(ctx, {
    type: 'bar',
    data: {
        labels: ['January', 'February', 'March', 'April', 'May', 'June'],
        datasets: [{
            label: 'Sales',
            data: [50, 60, 70, 80, 90, 100],
            backgroundColor: 'blue'
        }]
    },
    options: {
        scales: {
            xAxes: [{
                ticks: {
                    beginAtZero: true
                },
                scaleLabel: {
                    display: true,
                    labelString: 'Months'
                }
            }, {
                position: 'top',
                ticks: {
                    beginAtZero: true
                },
                scaleLabel: {
                    display: true,
                    labelString: 'Quarter 1'
                }
            }]
        }
    }
});