When I run apt-cache show inkscape, the bottom of the output has:
Description-md5: fed6589659211fb40b80d03dda6e5675
Homepage: http://www.inkscape.org/
Description-md5: fed6589659211fb40b80d03dda6e5675
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 9m
Task: ubuntu-usb, edubuntu-desktop-gnome, edubuntu-usb, ubuntustudio-video, ubuntustudio-graphics
But when I run apt-cache show pdfgrep, the line beginning with Task is absent:
Description-md5: 8c8a5397f782d81d957740280eb8f352
Homepage: http://pdfgrep.sourceforge.net/
Description-md5: 8c8a5397f782d81d957740280eb8f352
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Why is the line beginning with Task present for some packages and not for others?