Analysis of information sources in references of the Wikipedia article "St. Gallen" in English language version.
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(help)their primary economic concern: the capture of Europeans for the slave markets of the Islamic world […] Shortly after their establishment at Fraxinetum, the Andalusīs […] By 939 the Andalusīs had crossed the Alps (all the chroniclers praise their mountaineering abilities) and raided what is today northern Italy as well as southern Switzerland, where they attacked the renowned monastery of St. Gall