WARWICK — In celebration of National Arthritis Month, St. Anthony Community Hospital will present an informational event, “Complementary Herbal Remedies and Therapies,” along with a free food demonstration and tasting.The event will be held at 5:30 p.m. May 21 in the Greenbriar Room at Mount Alverno Center, 20 Grand St., Warwick.Mount Alverno is just a quarter mile past the hospital and there is ample parking space.