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In page History of São Tomé and Príncipe:
"Sporadic labor unrest and dissatisfaction continued well into the 20th century, culminating in an outbreak of riots in 1953 in which several hundred African laborers were killed in a clash with their Portuguese rulers, now known as the Batepá Massacre which remains a major event in the colonial history of the islands; its anniversary is officially observed by the government.[citation needed]
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