Assertion: boysenberry's fruit | /r/HasProperty | harvested over prolonged period
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Source sentences:
text: While the fruits can be harvested over a prolonged period, quality varies during this time; Jeppsson and Johansson note that berry weight reaches its peak early in the harvest period, anthocyanin levels reach their maximum a few weeks later, and brown compounds (which cause discoloration of the fruit) are at their lowest a week before anthocyanin levels peak.