Assertion: hardtack | /r/CapableOf | provide calorie
Facets:
Source sentences:
text: It is cheap; it is easy to make; it is shelf-stable; it has an extremely long shelf life (samples of Civil War-era hardtack are in museums today); it can be made in small batches or large; it can be used in an emergency as an important nutritional support and to provide calories (about 160 per biscuit), and it is extremely versatile.