$ sudo apt-get update
$ sudo apt-get install gnome-applets-data 

gnome-applets-data is installed in your system.

Make ensure the gnome-applets-data package were installed using the commands given below,

$ sudo dpkg-query -l | grep gnome-applets-data *

You will get with gnome-applets-data package name, version, architecture and description in a table

gnome-applets-data package basic information: