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"For centuries, people have considered four-leaf clovers to be magical \u2014 whether as an aid to spot fairies or a charm to bring the bearer good luck. So what exactly makes these tiny plants so special?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://people.howstuffworks.com/why-are-four-leaf-clovers-lucky2.htm>