apt - How do I know what version `do-release-upgrade` will upgrade to?

I'm running Lubuntu LTS 14.04, and looking to upgrade to the latest LTS (16.04). All upgrade guides (for example this one) seem to suggest that I should the official upgrading script called do-release-upgrade.

But how do I know that will take me from 14.04 to 16.04 (and not some other version, like for example the latest release 16.10)?

The output of do-release-upgrade itself does not seem to contain the version it's upgrading to. (Or am I missing something here?)