Assertion: grape's vitamin c | /r/HasProperty | powerful antioxidant
Facets:
Source sentences:
text: Vitamin C is a powerful antioxidant that boosts immunity, which can in turn help ward off an assortment of illnesses -- from cancer to heart disease to macular degeneration, a condition of aging eyes.
text: Grapes also contain vitamin C, beta-carotene, quercetin, lutein, lycopene and ellagic acid, which are powerful antioxidants as well ( 6 ).