The table below is from Cascading Style Sheets: Designing for the Web (third edition) by Håkon Wium & Bert Bos; Published by Addison-Wesley with ISBN 0-321-19312-1 in April 2005; and © 2005 by the authors. The code is a modified version of the example on pages 330-333.

What we saw on our trip to the beach
Animals Shops Cars
When? Who? Dogs Cats Crocodiles Bakeries Antiques Book Yellow Purple Black
Morning Judy 4 0 0 4 6 2 0 0 5
Alan 3 1 0 3 2 1 1 0 2
Tim 2 0 2 2 1 7 0 0 1
Afternoon Judy 2 1 0 4 2 2 0 1 1
Alan 2 1 0 1 2 3 0 0 1
Tim 4 4 1 3 3 6 1 1 5

This example is based on Show Everything: Revealing Normally Hidden Elements (at Eric Meyer's website).