NAct: The Nutrition & Activity Ontology for Healthy Living. - Dorothea Tsatsou; Elena Lalama; Saskia L. Wilson-Barnes; Kathryn Hart; Véronique A. Cornelissen; Roselien Buys; Ioannis Pagkalos; Sofia B. Dias; Kosmas Dimitropoulos; Petros Daras (FOIS, 2021)