Assertion: iceberg lettuce's head | /r/CapableOf | edge with dark-red
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Source sentences:
text: The best-known varieties of butterhead lettuce are: ‘Buttercrunch’ is very tender; ‘Boston’ forms a medium-large head of loosely arranged broad light-green leaves; ‘Bibb’ has a smaller more compact head of short dark-green leaves edged with dark-red; ‘Limestone’ which is very similar to Bibb but is named for the limestone soil in Kentucky and Indiana where it grows best; and ‘Four Seasons’ (‘Merveille Des Quatres Saisons’) has red outer leaves and pink and cream inner leaves.