Assertion: carrot's beta carotene | /r/AtLocation | bok choy
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Source sentences:
text: The second is called provitamin A which is part of the carotenoid family, such as beta-carotene which can be found in sweet potatoes, Bok Choy, carrots, spices, lettuce, dried herbs, butternut squash, cantaloupe, dried apricots, dark leafy greens, Romaine lettuce and winter squashes.