
The email keyword is deprecated.
It was used to specify emails for authors before that statement started taking pairs.
It now works like contact_us,
but if you use both email and contact_us,
email will be ignored.

To see an example, build:
bigtop -c example.bigtop all
Change to the Kids directory and look for example in these files:
docs/kids.bigtop lib/GENKids.pm lib/Kids.pm lib/Kids/Child.pm