Assertion: leaf clover | /r/CapableOf | take a lot of effort
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text: It takes a lot of effort to search for four-leaf varieties - you can find them among the other leaves, only if you have sharp eyesightShamrocks (with three or four leaves) have been considered good-luck symbols by the Irish since early times, and shamrocks or various representations of the plant are frequently worn on Saint Patrick's Day.