Four Core Issues?
In the article's second paragraph, I found this:

"PETA focuses on four core issues: factory farming, vivisection, animal testing, fur farming, and animals in entertainment." 

Uh...that's five. 

PETA focuses on four core issues: factory farming (1!), vivisection (2!), animal testing (3!), fur farming (4!), and animals in entertainment (5!).

See?