Array of strings in text argument in Scatter plot in Dash

I am trying to display multiple values while i hover on the data point in the scatter plot example given in the dash getting started page.

I want to display both country name and its population, but i cannot figure out a way to display multiple values while hovering over the point.

The link to the example is: https://dash.plot.ly/getting-started

It would be very helpful to get me started on dash if someone could help