Assertion: lemon juice's preservative | /r/CapableOf | prevent the discolouration of fruit
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Source sentences:
text: This chemical is common in our food supply and used as a preservative to prevent the discolouration of fruit (you've all seen the bright orange apricots), as an anti-microbial for wine (you've likely seen the phrase "contains sulfites"), in frozen pizza dough and pie crust, and in the case of lemon juice, to prevent it from rotting.