Assertion: egg white | /r/MadeOf | 6.6 micrograms of selenium
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Source sentences:
text: One egg white contains 55 milligrams of sodium and 1.3 micrograms of folate, 2.3 milligrams of calcium, 6.6 micrograms of selenium, 3.6 milligrams of magnesium, 4.9 milligrams of phosphorus, and 53.8 milligrams of potassium.