Assertion: beta carotene | /r/HasProperty | a precursor of vitamin a.
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Source sentences:
text: beta carotene is a precursor of vitamin A.
text: deficiency.26 Starting in the early 1990s and funded by the Rockefeller Foundation, Swiss scientists Ingo Potrykus and Peter Beyer took up the challenge of introducing genes that would support the biosynthesis of beta-carotene, a vitamin A precursor, in rice
text: Golden rice is a variety of rice (Oryza sativa) produced through genetic engineering to biosynthesize beta-carotene, a precursor of vitamin A, in the edible parts of rice.
text: Beta-carotene is known as a precursor of vitamin A that is found in fruits & vegetables.
text: In India, plant-based sources, particularly green leafy vegetables are widely consumed and are the main source of beta-carotene, a precursor of vitamin A.